Deck 34: Animal Reproduction and Development
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Deck 34: Animal Reproduction and Development
1
The tightly coiled tube that receives and stores sperm from one testis is a(an):
A)Scrotum
B)Vas deferens
C)Epididymis
D)Bulbo-urethral gland
E)Seminal vesicle
A)Scrotum
B)Vas deferens
C)Epididymis
D)Bulbo-urethral gland
E)Seminal vesicle
C
2
In the male,the tube that extends the length of the penis and carries semen out of the body is the:
A)Ejaculatory duct
B)Ureter
C)Urethra
D)Seminiferous tubule
E)Vas deferens
A)Ejaculatory duct
B)Ureter
C)Urethra
D)Seminiferous tubule
E)Vas deferens
E
3
The structure that secretes a thin,milky,alkaline fluid that activates the sperm to swim is the:
A)Bulbo-urethral gland
B)Seminal vesicle
C)Prostate gland
D)Vas deferens
E)Epididymis
A)Bulbo-urethral gland
B)Seminal vesicle
C)Prostate gland
D)Vas deferens
E)Epididymis
C
4
The end of the uterus that opens to the vagina is the:
A)Labia minora
B)Cervix
C)Vaginal orifice
D)Clitoris
E)Labia majora
A)Labia minora
B)Cervix
C)Vaginal orifice
D)Clitoris
E)Labia majora
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5
Cilia sweep the released mature oocytes from ovaries into the:
A)Cervix
B)Uterine tubes
C)Pubic symphysis
D)Uterus
E)Vagina
A)Cervix
B)Uterine tubes
C)Pubic symphysis
D)Uterus
E)Vagina
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6
The muscular sac-like organ of the human female in which the fetus develops is the:
A)Ovary
B)Pubic symphysis
C)Vagina
D)Uterus
E)Vulva
A)Ovary
B)Pubic symphysis
C)Vagina
D)Uterus
E)Vulva
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7
In the male,the sac-like structure that contains the testes is the:
A)Epididymis
B)Vas deferens
C)Scrotum
D)Sustentacular cells
E)Seminal vesicle
A)Epididymis
B)Vas deferens
C)Scrotum
D)Sustentacular cells
E)Seminal vesicle
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8
The cells in the ovary that give rise to the mature egg cells are the:
A)Follicle cells
B)Osteocytes
C)Endometrial cells
D)Polar bodies
E)Oocytes
A)Follicle cells
B)Osteocytes
C)Endometrial cells
D)Polar bodies
E)Oocytes
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9
The diploid first cell of a new organism is a:
A)Gamete
B)Morula
C)Polar body
D)Zygote
E)Oogonium
A)Gamete
B)Morula
C)Polar body
D)Zygote
E)Oogonium
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10
Which of the following is not found on a sperm cell?
A)Flagellum
B)Cilia
C)Nucleus
D)Acrosome
E)Mitochondria
A)Flagellum
B)Cilia
C)Nucleus
D)Acrosome
E)Mitochondria
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11
In the human male and female reproductive systems,each system contains paired primary sex organs called _______________,which contain ___________ that give rise to gametes.
A)Testes, sperm cells
B)Gonads, germ cells
C)Ovaries, egg cells
D)Bulbo-urethral glands, germ cells
E)All are correct
A)Testes, sperm cells
B)Gonads, germ cells
C)Ovaries, egg cells
D)Bulbo-urethral glands, germ cells
E)All are correct
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12
The cap-like __________________ covers the head of the sperm and releases enzymes that will help the sperm penetrate the egg.
A)Epididymis
B)Vas deferens
C)Acrosome
D)Mitochondria
E)Nucleus
A)Epididymis
B)Vas deferens
C)Acrosome
D)Mitochondria
E)Nucleus
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13
The inch-long structure in the human female that stimulates the female to experience orgasm is the:
A)Clitoris
B)Cervix
C)Pubic symphysis
D)Bulbo-urethral gland
E)Labia minora
A)Clitoris
B)Cervix
C)Pubic symphysis
D)Bulbo-urethral gland
E)Labia minora
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14
The process that unites the male gametes with the female gametes in organisms that reproduce sexually is termed:
A)Conjugation
B)Fertilization
C)Crossing over
D)Gastrulation
E)Recombination
A)Conjugation
B)Fertilization
C)Crossing over
D)Gastrulation
E)Recombination
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15
Mature human sperm cells:
A)Are spermatozoa
B)Are secondary spermatocytes
C)Contain 46 chromosomes
D)Are primary spermatocytes
E)Undergo meiosis
A)Are spermatozoa
B)Are secondary spermatocytes
C)Contain 46 chromosomes
D)Are primary spermatocytes
E)Undergo meiosis
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16
The structure that secretes most of the fluid found in the semen and opens into the vas deferens is the:
A)Epididymis
B)Bulbo-urethral gland
C)Ejaculatory duct
D)Seminal vesicle
E)Seminiferous tubule
A)Epididymis
B)Bulbo-urethral gland
C)Ejaculatory duct
D)Seminal vesicle
E)Seminiferous tubule
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17
The tightly coiled structure (structures)inside the testes that produce the sperm cells is (are)the:
A)Seminiferous tubules
B)Epididymis
C)Vas deferens
D)Interstitial cells
E)Bulbo-urethral glands
A)Seminiferous tubules
B)Epididymis
C)Vas deferens
D)Interstitial cells
E)Bulbo-urethral glands
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18
Human spermatogonia:
A)Are diploid cells that reside within the seminiferous tubules
B)Are germ cells
C)Are germ cells that reside within the seminiferous tubules
D)Reside within the seminiferous tubules
E)Are diploid
A)Are diploid cells that reside within the seminiferous tubules
B)Are germ cells
C)Are germ cells that reside within the seminiferous tubules
D)Reside within the seminiferous tubules
E)Are diploid
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19
In organisms that reproduce sexually,________ are the sex cells that carry the genetic information from each parent.
A)Diploid zygotes
B)Haploid zygotes
C)Haploid gametes
D)Diploid gametes
E)Diploid morulas
A)Diploid zygotes
B)Haploid zygotes
C)Haploid gametes
D)Diploid gametes
E)Diploid morulas
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20
In human males,the different types of male sex hormones are collectively called:
A)Estrogens
B)Growth hormones
C)Progesterones
D)Androgens
E)Follicle stimulating hormones
A)Estrogens
B)Growth hormones
C)Progesterones
D)Androgens
E)Follicle stimulating hormones
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21
Fertilization of a secondary oocyte normally occurs in the:
A)Ovary
B)Vagina
C)Fallopian tube
D)Uterus
E)Peritoneal cavity
A)Ovary
B)Vagina
C)Fallopian tube
D)Uterus
E)Peritoneal cavity
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22
In a secondary oocyte meiosis is arrested in metaphase II until:
A)Ovulation
B)FSH is present
C)Until fertilization occurs
D)Until LH is secreted by the anterior pituitary
E)Puberty
A)Ovulation
B)FSH is present
C)Until fertilization occurs
D)Until LH is secreted by the anterior pituitary
E)Puberty
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23
In humans the transparent sac that contains fluid that cushions the embryo and maintains a constant temperature and pressure is the:
A)Amnion
B)Yolk sac
C)Embryonic disc
D)Chorionic villus
E)Chorion
A)Amnion
B)Yolk sac
C)Embryonic disc
D)Chorionic villus
E)Chorion
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24
The hormone released from the hypothalamus that stimulates release of LH and FSH in both the male and female is:
A)Human growth hormone
B)Testosterone
C)Gonadotropin releasing hormone
D)Antidiuretic hormone
E)Epinephrine
A)Human growth hormone
B)Testosterone
C)Gonadotropin releasing hormone
D)Antidiuretic hormone
E)Epinephrine
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25
The structure that connects the embryo to the placenta is the:
A)Chorionic villus
B)Umbilical cord
C)Uterine tube
D)Fallopian tube
E)Embryonic disc
A)Chorionic villus
B)Umbilical cord
C)Uterine tube
D)Fallopian tube
E)Embryonic disc
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26
The stage of human development in which the endoderm,mesoderm,and ectoderm form is the:
A)Zygote
B)Gastrula
C)Embryonic stage
D)Morula
E)Fetal Stage
A)Zygote
B)Gastrula
C)Embryonic stage
D)Morula
E)Fetal Stage
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27
In humans if a preembryo splits before day 12 of development ___________________ are usually formed.
A)Polar bodies
B)Secondary oocytes
C)Fraternal twins
D)Identical twins
E)Embryonic discs
A)Polar bodies
B)Secondary oocytes
C)Fraternal twins
D)Identical twins
E)Embryonic discs
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28
The stage of human development that occurs from implantation to about eight weeks after fertilization is the:
A)Zygote
B)Morula
C)Gastrula
D)Fetal Stage
E)Embryonic stage
A)Zygote
B)Morula
C)Gastrula
D)Fetal Stage
E)Embryonic stage
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29
A gene called the _______________ gene on the Y chromosomes must be activated at about week seven of embryonic development for development of the male sex organs and glands.
A)SRY
B)GnRH
C)FSH
D)STD
E)GH
A)SRY
B)GnRH
C)FSH
D)STD
E)GH
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30
The surge of the hormone _______________ in the bloodstream of the female triggers ovulation.
A)FSH
B)LH
C)Estrogen
D)Progesterone
E)GnRH
A)FSH
B)LH
C)Estrogen
D)Progesterone
E)GnRH
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31
In females nearly all cases of ________________ cancer are associated with the human papillomavirus.
A)Ovarian
B)Lung
C)Breast
D)Cervical
E)All are correct
A)Ovarian
B)Lung
C)Breast
D)Cervical
E)All are correct
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32
The tube-like structure that serves as the birth canal in the human female is the:
A)Cervix
B)Vulva
C)Vagina
D)Uterus
E)Uterine tube
A)Cervix
B)Vulva
C)Vagina
D)Uterus
E)Uterine tube
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33
The hormone that is the basis of most pregnancy tests is:
A)Follicle stimulating hormone
B)Luteinizing hormone
C)Human chorionic gonadotropin
D)Estrogen
E)Progesterone
A)Follicle stimulating hormone
B)Luteinizing hormone
C)Human chorionic gonadotropin
D)Estrogen
E)Progesterone
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34
A teratogen that women had taken as a tranquilizer to relieve morning sickness that caused deformed limbs in developing embryos during the late 1950s was:
A)Acetaminophen
B)Acutane
C)Erythromycin
D)Thalidomide
E)Penicillin
A)Acetaminophen
B)Acutane
C)Erythromycin
D)Thalidomide
E)Penicillin
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35
Menopause:
A)Is the cessation of menstruation
B)Is the cessation of sperm production
C)Is the beginning of menstruation
D)Begins in most females at puberty
E)Begins in most males at puberty
A)Is the cessation of menstruation
B)Is the cessation of sperm production
C)Is the beginning of menstruation
D)Begins in most females at puberty
E)Begins in most males at puberty
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36
The correct sequence for the stages in development from conception to birth is:
A)Preembryonic stage, zygote, embryonic stage, fetal stage
B)Fetal stage, zygote, preembryonic stage, embryonic stage
C)Preembryonic stage, embryonic stage, zygote, fetal stage
D)Zygote, preembryonic stage, embryonic stage, fetal stage
E)Fetal stage, embryonic stage, preembryonic stage, zygote
A)Preembryonic stage, zygote, embryonic stage, fetal stage
B)Fetal stage, zygote, preembryonic stage, embryonic stage
C)Preembryonic stage, embryonic stage, zygote, fetal stage
D)Zygote, preembryonic stage, embryonic stage, fetal stage
E)Fetal stage, embryonic stage, preembryonic stage, zygote
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37
The gland that forms from ruptured follicle cells in the ovary and secretes estrogen and progesterone is the:
A)Bulbo-urethral gland
B)Prostate gland
C)Pubis symphysis
D)Pineal gland
E)Corpeus luteum
A)Bulbo-urethral gland
B)Prostate gland
C)Pubis symphysis
D)Pineal gland
E)Corpeus luteum
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38
Substances that cause birth defects are collectively called:
A)Androgens
B)Prostaglandins
C)Teratogens
D)Follicle stimulating hormones
E)None are correct
A)Androgens
B)Prostaglandins
C)Teratogens
D)Follicle stimulating hormones
E)None are correct
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39
The hormone released by the anterior pituitary that stimulates the development of the corpeus luteum is:
A)GnRH
B)FSH
C)LH
D)ADH
E)Progesterone
A)GnRH
B)FSH
C)LH
D)ADH
E)Progesterone
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40
After cleavage,the solid ball of 16 or more cells resembling a mulberry that forms is the:
A)Blastocyst
B)Gastrula
C)Morula
D)Embryonic disc
E)Amnion
A)Blastocyst
B)Gastrula
C)Morula
D)Embryonic disc
E)Amnion
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41
Male cuttlefish competing to mate with a female supports which definition of natural selection best?
A)Survival of the fittest
B)Longevity of the fittest
C)Reproduction of the fittest
D)Reproduction of the largest
E)Survival of the largest
A)Survival of the fittest
B)Longevity of the fittest
C)Reproduction of the fittest
D)Reproduction of the largest
E)Survival of the largest
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42
figure 34.13 
Based on figure 34.13,who is at the highest risk of contracting a sexually transmitted disease?
A)Males
B)Both have the same risk
C)Females

Based on figure 34.13,who is at the highest risk of contracting a sexually transmitted disease?
A)Males
B)Both have the same risk
C)Females
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43
Birth control pills contain a combination of estrogen and progesterone.What effect would this have on the hypothalamus?
A)It would secrete less FSH and LH
B)It would secrete more gonadotrophin releasing hormone
C)It would secrete more FSH and LH
D)It would secrete less gonadotrophin releasing hormone
E)There would be no effect on the hypothalamus
A)It would secrete less FSH and LH
B)It would secrete more gonadotrophin releasing hormone
C)It would secrete more FSH and LH
D)It would secrete less gonadotrophin releasing hormone
E)There would be no effect on the hypothalamus
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44
Athletes who take synthetic steroids can become sterile due to lack of sperm production.This is because of negative feedback on which of the following?
A)The epididymis
B)The testes
C)The vas deferens
D)The prostate
E)The hypothalamus
A)The epididymis
B)The testes
C)The vas deferens
D)The prostate
E)The hypothalamus
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45
Thalidomide was given to pregnant women from 1957-1961 to help relieve the symptoms of morning sickness.Thalidomide binds to and inactivates the protein cereblon,which is important in limb formation.If a woman took thalidomide during the _____ period of her baby's development,it could result in stunted growth of their limbs.
A)Preembryonic
B)Fetal
C)Prezygotic
D)Embryonic
E)Delivery
A)Preembryonic
B)Fetal
C)Prezygotic
D)Embryonic
E)Delivery
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46
A baby turtle growing into an adult that appears similar is an example of ____.
A)Direct development
B)External fertilization
C)Internal fertilization
D)Indirect development
E)Differentiation
A)Direct development
B)External fertilization
C)Internal fertilization
D)Indirect development
E)Differentiation
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47
A female chicken laying a fertilized egg has undergone ____ with a rooster.
A)Differentiation
B)External fertilization
C)Indirect development
D)Direct development
E)Internal fertilization
A)Differentiation
B)External fertilization
C)Indirect development
D)Direct development
E)Internal fertilization
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48
If a woman does not know she is pregnant,and undergoes a diagnostic medical procedure involving exposure of her abdomen to radiation,the developing baby may be at risk.Why would the risk of birth defects be highest if the woman received the radiation during weeks 2-8 of her pregnancy?
A)Organs first begin to develop during the pre-embryonic stage
B)Organs first begin to develop during the embryonic stage
C)Organs first begin to develop during the fetal stage
D)Organs first begin to develop during the zygotic stage
E)Organs first begin to develop during the morula stage
A)Organs first begin to develop during the pre-embryonic stage
B)Organs first begin to develop during the embryonic stage
C)Organs first begin to develop during the fetal stage
D)Organs first begin to develop during the zygotic stage
E)Organs first begin to develop during the morula stage
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49
A diaphragm is a shallow,dome-shaped rubber disk with a flexible rim that fits within the vagina and covers the cervix.How does this act as a contraceptive to prevent pregnancy?
A)It would prevent sperm from reaching the egg
B)It would prevent ovulation
C)It would cause the embryo to die
D)It would prevent implantation on the uterine wall
E)If would act as a spermicide, killing sperm
A)It would prevent sperm from reaching the egg
B)It would prevent ovulation
C)It would cause the embryo to die
D)It would prevent implantation on the uterine wall
E)If would act as a spermicide, killing sperm
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50
A vasectomy is a surgical procedure in which the vas deferens are severed,and then tied.How would this cause sterility?
A)Sperm cannot be produced by meiosis
B)Sperm cannot be produced by mitosis
C)Sperm cannot move to the urethra
D)A man cannot get an erection
E)The testes stop producing testosterone
A)Sperm cannot be produced by meiosis
B)Sperm cannot be produced by mitosis
C)Sperm cannot move to the urethra
D)A man cannot get an erection
E)The testes stop producing testosterone
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51
A caterpillar turning into a butterfly is an example of ____.
A)External fertilization
B)Internal fertilization
C)Indirect development
D)Direct development
E)Reproduction
A)External fertilization
B)Internal fertilization
C)Indirect development
D)Direct development
E)Reproduction
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52
A tubal ligation is a surgical procedure in which the fallopian tubes are severed,and then tied.How would this cause sterility?
A)Oocytes cannot be produced by meiosis
B)Oocytes cannot move to the uterus
C)Oocytes cannot be produced by mitosis
D)A woman cannot have an orgasm
E)The ovary stops producing estrogen
A)Oocytes cannot be produced by meiosis
B)Oocytes cannot move to the uterus
C)Oocytes cannot be produced by mitosis
D)A woman cannot have an orgasm
E)The ovary stops producing estrogen
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53
Often a woman may first suspect she is pregnant when she misses a period or menstrual cycle.What causes a pregnant woman to miss a period?
A)Chorionic gonadotropin causes the corpus luteum to produce progesterone
B)Chorionic gonadotropin blocks the corpus luteum from producing progesterone
C)Follicle stimulating hormone causes the corpus luteum to produce progesterone
D)Follicle stimulating hormone blocks the corpus luteum from producing progesterone
E)Luteinizing hormone blocks the corpus luteum from producing progesterone
A)Chorionic gonadotropin causes the corpus luteum to produce progesterone
B)Chorionic gonadotropin blocks the corpus luteum from producing progesterone
C)Follicle stimulating hormone causes the corpus luteum to produce progesterone
D)Follicle stimulating hormone blocks the corpus luteum from producing progesterone
E)Luteinizing hormone blocks the corpus luteum from producing progesterone
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54
On July 25,1978,Louise Joy Brown,the world's first successful test-tube baby was born.Today,nearly 1% of all births in the U.S.start in the laboratory.Babies conceived through IVF are twice as likely to be born prematurely,but do not show any increase in major birth malformations,cancer,or abnormal psychological development.What is the best explanation for the lack of birth defects in IVF babies?
A)They are implanted while in the embryonic period
B)They are implanted while in the fetal period
C)They are implanted while in the preembryonic period
D)They are grown in the laboratory until they are a full grown baby
E)They are grown in the lab until they are a viable fetus
A)They are implanted while in the embryonic period
B)They are implanted while in the fetal period
C)They are implanted while in the preembryonic period
D)They are grown in the laboratory until they are a full grown baby
E)They are grown in the lab until they are a viable fetus
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55
Birth control pills contain a combination of estrogen and progesterone.How would this prevent pregnancy?
A)It would prevent sperm from reaching the egg
B)It would cause the embryo to die
C)It would prevent implantation on the uterine wall
D)If would act as a spermicide, killing sperm
E)It would prevent ovulation
A)It would prevent sperm from reaching the egg
B)It would cause the embryo to die
C)It would prevent implantation on the uterine wall
D)If would act as a spermicide, killing sperm
E)It would prevent ovulation
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56
A female salmon laying unfertilized eggs in a nest is preparing them for ____ by a male salmon.
A)External fertilization
B)Internal fertilization
C)Indirect development
D)Direct development
E)Differentiation
A)External fertilization
B)Internal fertilization
C)Indirect development
D)Direct development
E)Differentiation
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57
Often a woman may first suspect she is pregnant when she misses a period or menstrual cycle.Why is it important for the menstrual cycle to be blocked during a pregnancy?
A)To prevent additional fertilizations
B)To conserve eggs
C)To avoid having twins
D)To prevent the blastocyst from being lost
E)To prevent the loss of the corpus luteum
A)To prevent additional fertilizations
B)To conserve eggs
C)To avoid having twins
D)To prevent the blastocyst from being lost
E)To prevent the loss of the corpus luteum
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58
Athletes who take synthetic steroids can become sterile due to lack of sperm production.This is because the synthetic steroids cause which of the following?
A)A decrease in FSH and LH production
B)An increase in FSH and LH production
C)A decrease in FSH and an increase in LH production
D)An increase in FSH and a decrease in LH production
A)A decrease in FSH and LH production
B)An increase in FSH and LH production
C)A decrease in FSH and an increase in LH production
D)An increase in FSH and a decrease in LH production
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59
Birth control pills contain a combination of estrogen and progesterone.What effect would this have on the anterior pituitary?
A)It would secrete less FSH and LH
B)It would secrete less gonadotrophin releasing hormone
C)It would secrete more gonadotrophin releasing hormone
D)It would secrete more FSH and LH
E)There would be no effect on the anterior pituitary
A)It would secrete less FSH and LH
B)It would secrete less gonadotrophin releasing hormone
C)It would secrete more gonadotrophin releasing hormone
D)It would secrete more FSH and LH
E)There would be no effect on the anterior pituitary
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60
figure 34.13 
Based on figure 34.13,why do you think females have the highest risk of contracting a sexually transmitted disease?
A)Because they will receive fluids from the male during sex
B)Because their immune systems are weaker
C)Because they have sex more often than males
D)Because they are more likely to engage in risky sex than a male

Based on figure 34.13,why do you think females have the highest risk of contracting a sexually transmitted disease?
A)Because they will receive fluids from the male during sex
B)Because their immune systems are weaker
C)Because they have sex more often than males
D)Because they are more likely to engage in risky sex than a male
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61
How did the authors measure if a male was successful in fertilizing a female?
A)By watching to see if the male mated with the female
B)By comparing the baby cuttlefish with the father to look for similarities
C)By removing the other males from the area
D)By using DNA paternity testing
E)By measuring the time the male spent guarding a female
A)By watching to see if the male mated with the female
B)By comparing the baby cuttlefish with the father to look for similarities
C)By removing the other males from the area
D)By using DNA paternity testing
E)By measuring the time the male spent guarding a female
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62
Males who act as female impersonators can change their skin color to look like a female.How is this accomplished?
A)By rolling in the mud to cover the stripes that identify them as male
B)By secreting ink that clouds their color
C)By expressing permanent pigments in their skin
D)By shedding their skin revealing different colored melanophores
E)By contracting muscles to expose different chromatophores
A)By rolling in the mud to cover the stripes that identify them as male
B)By secreting ink that clouds their color
C)By expressing permanent pigments in their skin
D)By shedding their skin revealing different colored melanophores
E)By contracting muscles to expose different chromatophores
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63
When sperm production is too high,sustentacular cells release into the blood stream a hormone called inhibin which blocks additional release of FSH from the pituitary.This is an example of positive feedback.
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64
The menstrual cycle controls the timing of oocyte maturation in the ovaries.
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65
When a spermatogonium divides mitotically,one daughter cell remains in the seminiferous tubule wall and acts as stem cell that gives rise to cells that specialize into sperm.
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66
figure 34.25 
In figure 34.25,what is the independent variable?
A)The size of the male
B)How successful a male was at fertilizing a female
C)If a male acted as a female
D)If a male removed the sperm packet that other males had implanted into a female
E)How long a male guarded a female

In figure 34.25,what is the independent variable?
A)The size of the male
B)How successful a male was at fertilizing a female
C)If a male acted as a female
D)If a male removed the sperm packet that other males had implanted into a female
E)How long a male guarded a female
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67
Taking antibiotics can disrupt the microbial community of the vagina and create an opportunity for the yeast Candida albicans to cause an infection.
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68
The ovarian cycle prepares the uterus for pregnancy.
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69
When a female cuttlefish accepts a male's mating attempt,the two animals align head-to-head,and he inserts a sperm packet into a pouch near her mouth.This is an example of ____.
A)Sexual internal fertilization
B)Sexual external fertilization
C)Asexual internal fertilization
D)Asexual external fertilization
E)Hermaphroditic fertilization
A)Sexual internal fertilization
B)Sexual external fertilization
C)Asexual internal fertilization
D)Asexual external fertilization
E)Hermaphroditic fertilization
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70
figure 34.25 
In figure 34.25,what is the dependent variable?
A)How long a male guarded a female
B)If a male acted as a female
C)If a male removed the sperm packet that other males had implanted into a female
D)How successful a male was at fertilizing a female
E)The size of the male

In figure 34.25,what is the dependent variable?
A)How long a male guarded a female
B)If a male acted as a female
C)If a male removed the sperm packet that other males had implanted into a female
D)How successful a male was at fertilizing a female
E)The size of the male
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71
A flexible rod-like structure that forms the basic framework of the vertebral column is the notochord.
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72
The second stage of prenatal development is the fetal stage.
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73
Cuttlefish have a closed circulatory system and live under water.Which of the following organs would they have?
A)A heart and gills
B)A heart and lungs
C)A heart
D)Lungs
E)Gills
A)A heart and gills
B)A heart and lungs
C)A heart
D)Lungs
E)Gills
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74
Cuttlefish and cephalopods are in which group of animals?
A)Fish
B)Annelids
C)Mollusks
D)Reptiles
E)Cnidarians
A)Fish
B)Annelids
C)Mollusks
D)Reptiles
E)Cnidarians
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75
The intake of alcohol,cigarette smoking,and insufficient vitamin intake may all cause birth defects in a developing fetus.
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76
What did the authors observe when they videotaped female impersonators?
A)Female impersonators were more successful at mating than males who guarded a female
B)Three out of five female impersonators were successful in mating
C)Females never mated with males who were impersonating females
D)There was no correlation between the size of a male cuttlefish and being a female impersonator
E)There was no correlation between time spent guarding a female and reproductive success
A)Female impersonators were more successful at mating than males who guarded a female
B)Three out of five female impersonators were successful in mating
C)Females never mated with males who were impersonating females
D)There was no correlation between the size of a male cuttlefish and being a female impersonator
E)There was no correlation between time spent guarding a female and reproductive success
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77
The trophoblast secretes enzymes that aid in its implantation into the uterine lining and sends out fingerlike projections into the uterine lining.
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78
Ovulation is triggered by a surge of LH in the blood stream.
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79
figure 34.25 
What can be concluded from figure 34.25?
A)Female impersonators were successful in mating 50% of the time
B)Males who guard a female for 0-20 minutes had the most reproductive success
C)Males who guard a female for more than 40 minutes had the most reproductive success
D)There was no correlation between time spent guarding a female and reproductive success
E)Males who guard a female for 20-40 minutes had the most reproductive success

What can be concluded from figure 34.25?
A)Female impersonators were successful in mating 50% of the time
B)Males who guard a female for 0-20 minutes had the most reproductive success
C)Males who guard a female for more than 40 minutes had the most reproductive success
D)There was no correlation between time spent guarding a female and reproductive success
E)Males who guard a female for 20-40 minutes had the most reproductive success
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