Question 1

Mi Lei is pregnant and her body is currently experiencing the event that triggers hormonal changes that will prevent further menstruation. This event is called

Accepted Answer

Implantation is the event where the fertilized egg attaches to the lining of the uterus, triggering hormonal changes that prevent further menstruation during pregnancy.

Question 2

Hair and the nervous system develop during the embryonic period from cells contained in the ____ layer.

Accepted Answer

Hair and the nervous system develop from the ectoderm, which is the outermost layer of the three primary germ layers in an embryo.

Question 3

A physician has just informed pregnant Moesha that the human organism developing inside of her has just begun to show differentiation of its cells. As a knowledgeable student, you would know that such an organism is technically called a(n)

Accepted Answer

The answer of A physician has just informed pregnant Moesha...

Question 4

Prenatal development begins

Accepted Answer

Prenatal development starts at conception, when the sperm fertilizes the egg, creating a zygote. This marks the beginning of a new organism's development.

Question 5

Whose behavior best exemplifies eugenics?

Accepted Answer

Eugenics involves controlling who can reproduce or which traits are passed on to future generations. Dr. Black's action of allowing only certain individuals to mate aligns with the principles of eugenics, as it involves selective breeding to enhance or suppress certain genetic traits.

Question 6

The uniting of the egg and sperm (conception) typically takes place in the

Accepted Answer

The uniting of the egg and sperm, or conception, typically takes place in the fallopian tube. This is where the sperm meets the egg as it travels down from the ovary towards the uterus.

Question 7

A developing human that is traveling from a fallopian tube to the uterus would most accurately be described as a(n)

Accepted Answer

A developing human immediately after fertilization and as it travels from the fallopian tube to the uterus is most accurately described as a zygote. This stage occurs before it becomes an embryo.

Question 8

Which period is not considered part of prenatal development?

Accepted Answer

The period of the neonate refers to the stage following birth, not prenatal development which occurs before birth.

Question 9

If Agnieszka found out that she was conceived through in vitro fertilization, she would know for certain that

Accepted Answer

In vitro fertilization (IVF) is a process where an egg is fertilized by sperm outside the body, typically in a lab dish. This means Agnieszka was conceived in a Petri dish or similar laboratory environment.

Question 10

Damage to cells in the embryo's ____ layer would be most likely to result in the development of a defective digestive system.

Accepted Answer

The endoderm is the innermost layer of the embryo, which gives rise to the lining of the digestive system and other internal organs. Damage to this layer would likely result in defects in the digestive system.

Question 11

At five weeks after conception, a developing human is most accurately called a(n)

Accepted Answer

At five weeks after conception, the developing human is referred to as an embryo. This stage lasts until about the eighth week, after which it is called a fetus.

Question 12

The point at which a zygote burrows into the uterine wall is referred to as

Accepted Answer

Implantation is the process by which a zygote (the cell resulting from the fertilization of an egg by a sperm) attaches to and penetrates the uterine wall to establish a pregnancy.

Question 13

The developing human organism that has just become completely embedded in the wall of the uterus is called the

Accepted Answer

The developing human organism is called an embryo after it becomes embedded in the wall of the uterus, following the zygote stage and before becoming a fetus.

Question 14

Jack and Jill are twins. Because he is a boy, Jack's parents encourage him to run. However, they discourage Jill from engaging in athletic activity. As a result, Jack is much faster at running up a hill than Jill. The difference in Jack and Jill's behavior is best explained by

Accepted Answer

The difference in Jack and Jill's behavior is best explained by nonshared environmental influences, which refer to the environmental factors that are not shared between siblings and can lead to differences in their behaviors and personalities. In this case, the parents' differential treatment based on gender is a nonshared environmental influence that affects Jack and Jill differently.

Question 15

Which statement concerning preimplantation genetic screening (PGS) is false ?

Accepted Answer

Preimplantation genetic screening (PGS) can indeed be used to determine the sex of the child-to-be, as it involves analyzing the chromosomes of embryos created through IVF for genetic conditions, which includes identifying the sex chromosomes (XX for female, XY for male).

Question 16

The period of the ____ lasts for approximately two weeks.

Accepted Answer

The zygote period, also known as the germinal stage, lasts for approximately two weeks from fertilization until implantation in the uterine wall.

Question 17

Which event occurs following in vitro fertilization?

Accepted Answer

In vitro fertilization (IVF) involves fertilizing an egg outside the body and then placing the fertilized egg, or embryo, directly into the uterus to develop.

Question 18

The ____ is the cluster of cells in the center of the zygote that will eventually develop into the baby.

Accepted Answer

The germ disc is the cluster of cells in the center of the zygote that will eventually develop into the baby.

Question 19

What began as a single fertilized egg has just separated into two distinct eggs. This indicates the formation of ____ twins that has occurred during the ____ period of development.

Accepted Answer

When a single fertilized egg separates into two distinct eggs, it results in the formation of identical twins. This separation typically occurs during the zygotic period of development, which is the early stage immediately following fertilization.

Question 20

The ____ is the structure through which a mother and an embryo exchange waste and nutrients.

Accepted Answer

The placenta is the organ that develops in the uterus during pregnancy. This structure provides oxygen and nutrients to the growing baby and removes waste products from the baby's blood.

Quiz 2: Biological Foundations: Heredity, Prenatal Development, and Birth