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Exam 30: Animal Reproduction and Development

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Question 21

Multiple Choice

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What is the ideal outcome of the human reproductive system?

A) to create individuals better suited to the environment than the existing individuals
B) to create diploid gametes
C) to break down foreign invaders and pathogens in any location in the body
D) to remove foreign invaders and pathogens entering through the genitals
E) All answers are correct.

F) B) and D)
G) All of the above

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Question 22

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The structure that secretes most of the fluid found in the semen and opens into the vas deferens is the

A) epididymis.
B) urethra.
C) ejaculatory duct.
D) seminal vesicle.
E) seminiferous tubulE.

F) B) and E)
G) A) and E)

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Question 23

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Birth control pills contain a combination of estrogen and progesterone.What effect would this have on the anterior pituitary?

In the section "Investigating Life: The 'Cross-Dressers' of the Reef",what is the independent variable?

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.

The menstrual cycle controls the timing of oocyte maturation in the ovaries.

Which of the following is correct about sexually-transmitted diseases?

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?

In the section "Investigating Life: The 'Cross-Dressers' of the Reef",male cuttlefish competing to mate with a female supports which definition of natural selection best?

The ovarian cycle prepares the uterus for pregnancy.

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?

In the late 1950s,some women took ______ as a tranquilizer to relieve morning sickness and it caused deformed limbs in developing embryos.

When a germ cell 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.

The events of the birthing process use positive feedback.The stretching of the cervix during pre-labor or stage 1 of labor causes the hypothalamus to trigger the pituitary gland to release the hormone oxytocin,which causes uterine contractions.

The tightly coiled structure (structures) inside the testes that produce the sperm cells is (are) the

Which of the following is NOT a component of a sperm cell?

In the section "Investigating Life: The 'Cross-Dressers' of the Reef",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

If a woman does not know she is pregnant and undergoes a diagnostic medical procedure involving exposure of her abdomen to radiation,then 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?

The intake of alcohol,cigarette smoke,and insufficient amounts of vitamins may all cause birth defects in a developing fetus.

The second stage of prenatal development is the fetal stage.