Question 1

When a chemical signal from a group of embryonic cells causes a different, nearby group of cells to embark on a particular developmental course (say, differentiating into a leg) , the interaction between the two groups of cells is called

Accepted Answer

A)  induction.
B)  coordinated differentiation.
C)  implantation.
D)  potentiation.E) A) and B)
F) None of the above

Question 2

The function of a sperm cell's acrosome is to

Accepted Answer

A)  carry the sperm's nucleus.
B)  fuse with the jelly coat of the egg cell.
C)  carry enzymes that help the sperm penetrate the egg.
D)  carry the fuel that powers the sperm.E) B) and C)
F) B) and D)

Question 3

Which of the following STDs is caused by a virus that can also cause cancer?

Accepted Answer

A)  genital warts
B)  syphilis
C)  gonorrhea
D)  candidiasisE) B) and D)
F) A) and B)

Question 4

At the end of gastrulation, the ectoderm makes up the

Accepted Answer

A)  lining of the embryonic digestive tract.
B)  embryonic nervous system.
C)  outer layer of the gastrula.
D)  inner layer of the gastrula.E) All of the above
F) A) and C)

Question 5

Two important contributions that cleavage makes to development are to

Accepted Answer

A)  establish the basic tissues of the body and define the future nervous system.
B)  create a multicellular embryo and partition the embryo into developmental regions.
C)  create a multicellular embryo and establish the basic tissues of the body.
D)  establish the basic body plan and determine the location of the mouth and anus.E) C) and D)
F) B) and D)

Question 6

Which of the following options correctly lists the three stages of labor in the order in which they occur?

Accepted Answer

A)  dilation, expulsion, delivery of the placenta
B)  dilation, crowning, expulsion
C)  contractions, dilation, expulsion
D)  dilation, crowning, delivery of the placentaE) A) and D)
F) None of the above

Question 7

What would happen if the chorion failed to secrete human chorionic gonadotropin?

Accepted Answer

A)  The maternal elements of the placenta would fail to develop.
B)  The fetal elements of the placenta would fail to develop.
C)  Neural tube formation would not occur, and the embryo would have no central nervous system.
D)  The embryo would be aborted.E) B) and C)
F) A) and D)

Question 8

Research indicates that ________ respond(s) to ________ signals that inform a cell about its position relative to other cells in the embryo.

Accepted Answer

A)  nervous tissue; hormonal
B)  master control genes; chemical
C)  organs; radio
D)  organelles; chemicalE) A) and B)
F) A) and C)

Question 9

After reading the paragraph below, answer the questions that follow.
Brittany's family includes several individuals with a genetic disorder that affects primarily males. Her husband Tony has no history of the disease. They have decided that their best chance to have a healthy family is to have only daughters. Through a new type of assisted reproductive technology, it is possible to separate sperm that will produce sons from those that will produce daughters. Brittany's eggs will be fertilized by in vitro fertilization (IVF)  with sperm that can produce only daughters. The developing female embryo can be implanted into her uterus to complete development normally.
-The daughter-producing sperm used to fertilize Brittany's eggs should be

Accepted Answer

A)  diploid primary spermatocytes.
B)  haploid secondary spermatocytes.
C)  haploid sperm cells.
D)  diploid sperm cells.E) A) and B)
F) A) and C)

Question 10

After being produced in the testes, sperm mature further in a structure called the

Accepted Answer

A)  vas deferens.
B)  epididymis.
C)  prostate.
D)  seminal vesicle.E) A) and B)
F) All of the above

Question 11

Which of the following options correctly lists the sequence in which most animals develop?

Accepted Answer

A)  zygote, cleavage, blastula, gastrula, organ formation
B)  cleavage, zygote, gastrula, blastula, organ formation
C)  zygote, cleavage, gastrula, blastula, organ formation
D)  zygote, cleavage, organ formation, blastula, gastrulaE) A) and B)
F) All of the above

Question 12

Which of the following structures develops from mesodermal tissue?

Accepted Answer

A)  muscles
B)  lining of the digestive tract
C)  skin
D)  nervous systemE) A) and B)
F) None of the above

Question 13

Another term for gestation is

Accepted Answer

A)  conception.
B)  fertilization.
C)  development.
D)  pregnancy.E) None of the above
F) A) and B)

Question 14

An advantage of human testes being positioned in an external sac rather than in the abdominal cavity is that

Accepted Answer

A)  the distance that that semen must travel during ejaculation is shortened.
B)  the distance that sperm must swim during insemination is shortened.
C)  the testes can be kept cooler than the body's interior.
D)  the testes can enlarge during sexual maturation.E) All of the above
F) None of the above

Question 15

A vasectomy is a form of male sterilization in which each vas deferens is cut, but most of the male's reproductive physiology remains intact. Which of the following will not continue to occur in a male who has had a vasectomy?

Accepted Answer

A)  Sperm will be produced in the seminiferous tubules.
B)  Seminal fluid will be ejaculated from the penis during orgasm.
C)  Glandular secretions will be ejaculated from the penis during orgasm.
D)  Sperm will be ejaculated from the penis during orgasm.E) B) and D)
F) B) and C)

Question 16

Hermaphrodites are animals that

Accepted Answer

A)  possess both male and female reproductive systems.
B)  have the gonads of one sex but the external appearance of the other.
C)  develop from unfertilized eggs.
D)  must fertilize themselves.E) B) and D)
F) A) and B)

Question 17

At which gestational age does a developing human fetus first look obviously human and not like other vertebrate embryos?

Accepted Answer

A)  2 weeks
B)  4 weeks
C)  9 weeks
D)  4 monthsE) B) and D)
F) A) and B)

Question 18

Cells migrate from one place to another during gastrulation using

Accepted Answer

A)  cilia.
B)  cellular protrusions.
C)  flagella.
D)  peristalsis.E) A) and B)
F) A) and C)

Question 19

A pregnant woman goes to her obstetrician for her first ultrasound. After the exam is over, the doctor remarks, "It looks like the ribs are still developing, and I might even have seen some tiny fingers and toes." How many weeks pregnant is this woman?

Accepted Answer

A)  less than 5 weeks
B)  between 5 and 8 weeks
C)  between 8 and 14 weeks
D)  more than 14 weeksE) B) and D)
F) None of the above

Question 20

The human egg is swept through the oviduct toward the uterus by

Accepted Answer

A)  the beating of the egg's cilia.
B)  rhythmic contractions of the oviduct.
C)  rhythmic contractions of the uterus.
D)  the beating of cilia in the oviduct.E) A) and C)
F) B) and C)

Exam 27: Reproduction and Embryonic Development

At the end of gastrulation, the ectoderm makes up the

Correct Answer
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Correct Answer
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Which of the following options correctly lists the three stages of labor in the order in which they occur?

Correct Answer
verified

The human egg is swept through the oviduct toward the uterus by

Correct Answer
verified

A pregnant woman goes to her obstetrician for her first ultrasound. After the exam is over, the doctor remarks, "It looks like the ribs are still developing, and I might even have seen some tiny fingers and toes." How many weeks pregnant is this woman?

Correct Answer
verified

Which of the following STDs is caused by a virus that can also cause cancer?

Correct Answer
verified

Which of the following structures develops from mesodermal tissue?

Correct Answer
verified

Two important contributions that cleavage makes to development are to

Correct Answer
verified

Hermaphrodites are animals that

Correct Answer
verified

Research indicates that respond(s) to signals that inform a cell about its position relative to other cells in the embryo.

Correct Answer
verified

An advantage of human testes being positioned in an external sac rather than in the abdominal cavity is that

Correct Answer
verified

At which gestational age does a developing human fetus first look obviously human and not like other vertebrate embryos?

Correct Answer
verified

Another term for gestation is

Correct Answer
verified

The function of a sperm cell's acrosome is to

Correct Answer
verified

Cells migrate from one place to another during gastrulation using

Correct Answer
verified

When a chemical signal from a group of embryonic cells causes a different, nearby group of cells to embark on a particular developmental course (say, differentiating into a leg) , the interaction between the two groups of cells is called

Correct Answer
verified

Which of the following options correctly lists the sequence in which most animals develop?

Correct Answer
verified

A vasectomy is a form of male sterilization in which each vas deferens is cut, but most of the male's reproductive physiology remains intact. Which of the following will not continue to occur in a male who has had a vasectomy?

Correct Answer
verified

After being produced in the testes, sperm mature further in a structure called the

Correct Answer
verified

What would happen if the chorion failed to secrete human chorionic gonadotropin?

Correct Answer
verified

Exam 27: Reproduction and Embryonic Development

At the end of gastrulation, the ectoderm makes up the

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following options correctly lists the three stages of labor in the order in which they occur?

Correct AnswerverifiedShow Answer

The human egg is swept through the oviduct toward the uterus by

Correct AnswerverifiedShow Answer

A pregnant woman goes to her obstetrician for her first ultrasound. After the exam is over, the doctor remarks, "It looks like the ribs are still developing, and I might even have seen some tiny fingers and toes." How many weeks pregnant is this woman?

Correct AnswerverifiedShow Answer

Which of the following STDs is caused by a virus that can also cause cancer?

Correct AnswerverifiedShow Answer

Which of the following structures develops from mesodermal tissue?

Correct AnswerverifiedShow Answer

Two important contributions that cleavage makes to development are to

Correct AnswerverifiedShow Answer

Hermaphrodites are animals that

Correct AnswerverifiedShow Answer

Research indicates that ________ respond(s) to ________ signals that inform a cell about its position relative to other cells in the embryo.

Correct AnswerverifiedShow Answer

An advantage of human testes being positioned in an external sac rather than in the abdominal cavity is that

Correct AnswerverifiedShow Answer

At which gestational age does a developing human fetus first look obviously human and not like other vertebrate embryos?

Correct AnswerverifiedShow Answer

Another term for gestation is

Correct AnswerverifiedShow Answer

The function of a sperm cell's acrosome is to

Correct AnswerverifiedShow Answer

Cells migrate from one place to another during gastrulation using

Correct AnswerverifiedShow Answer

When a chemical signal from a group of embryonic cells causes a different, nearby group of cells to embark on a particular developmental course (say, differentiating into a leg) , the interaction between the two groups of cells is called

Correct AnswerverifiedShow Answer

Which of the following options correctly lists the sequence in which most animals develop?

Correct AnswerverifiedShow Answer

A vasectomy is a form of male sterilization in which each vas deferens is cut, but most of the male's reproductive physiology remains intact. Which of the following will not continue to occur in a male who has had a vasectomy?

Correct AnswerverifiedShow Answer

After being produced in the testes, sperm mature further in a structure called the

Correct AnswerverifiedShow Answer

What would happen if the chorion failed to secrete human chorionic gonadotropin?

Correct AnswerverifiedShow Answer

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Research indicates that respond(s) to signals that inform a cell about its position relative to other cells in the embryo.

Correct Answer
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