The intense selective pressure for terrestrial vertebrates to evolve internal fertilization was that on land
A) the eggs are too small for the males to find and fertilize.
B) the gametes could not be released next to each other,as they would soon dry up and perish.
C) there is no mechanism for eggs and sperm to find one another.
D) terrestrial organisms only produce small quantities of gametes.
E) gametes and zygotes are vulnerable to predators.
Correct Answer:
Verified
Q3: In humans, which embryonic tissues are "indifferent"?
A)vertebral
Q18: _ reproduction is the primary means of
Q19: Terrestrial vertebrates and some fish evolved _
Q20: The most important adaptation of the reptiles
Q21: _ stimulates contraction of uterus.
A)LH
B)Testosterone
C)Progesterone
D)Prolactin
E)Oxytocin
Q24: Ovoviviparity is found in
A)reptiles.
B)birds.
C)mammals.
D)mollies and guppies.
E)marsupials.
Q24: _ completes preparation of uterus for pregnancy.
A)FSH
B)LH
C)Testosterone
D)Progesterone
E)Prolactin
Q25: The hormones involved in the estrous cycle
Q27: Which of the following statements is true
Q28: An adult male produces sperm continuously by
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