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1

True or false. Scientists now support the idea of preformation.
A)True
B)False
2

What part of a developing newt embryo is a vital trigger in embryonic development?
A)yolk sac
B)dorsal lip
C)embryonic disk
D)trophoblast
3

Why is the cloned sheep, Dolly, already considered old?
A)her gender plays a role
B)X inactivation
C)telomere shortening
D)All of these are correct.
4

True or false. Generally speaking, once a cell has become specialized, developmental genes are turned off.
A)True
B)False
5

What is the first stage of development?
A)ovulation
B)fertilization
C)implantation
D)specialization
6

Genes that, when mutated, lead to organisms with body parts in the wrong places are called _________.
A)homeopathic
B)morphogenes
C)somatic
D)homeotic
7

Where are sperm cells stored in the human male until they mature?
A)seminiferous tubules
B)rete testes
C)epididymis
D)vas deferens
8

What gland does not contribute to seminal fluid?
A)pineal gland
B)prostate gland
C)bulbourethral glands
D)seminal vesicles
9

The uterine lining is called the _____________.
A)labia majora
B)cervix
C)endometrium
D)myometrium
10

Ovulation in human females is triggered by ________________.
A)presence of sperm cells in the reproductive tract
B)midcycle surge of LH
C)degeneration of corpus luteum
D)increasing levels of estrogen
11

Which hormone is the basis for human pregnancy tests?
A)estrogen
B)progesterone
C)prostaglandins
D)human chorionic gonadotropin
12

When is the embryonic stage of human development?
A)fertilization to one month
B)two to eight weeks
C)eight weeks to six months
D)first trimester
13

True or false. A process called capacitation activates sperm inside a woman so the sperm may enter the oocyte.
A)True
B)False
14

True or false. The oocyte is encased in a layer of cells, called the zona pellucida, at ovulation.
A)True
B)False
15

Which birth control method has a high success rate of protecting against both pregnancy and sexually transmitted disease?
A)birth control pill
B)hormonal implants
C)rhythm method
D)condom and spermicide
16

Which embryonic stage has three distinct germ layers?
A)morula
B)blastocyst
C)gastrula
D)None of these is correct.
17

Which structure in the developing embryo gives rise to the notochord?
A)primitive streak
B)allantois
C)mesoderm cells
D)trophoblast
18

When does the cartilage skeleton appear in the embryo?
A)1-2 weeks
B)7-8 weeks
C)2-3 months
D)last trimester
19

Which extraembryonic membrane gives rise to the arteries and vein of the umbilical cord?
A)yolk sac
B)amnion
C)chorion
D)allantois
20

Why do premature infants often have difficulty breathing?
A)too small to have effective breathing muscles
B)they lack sufficient hemoglobin
C)respiratory system is one of the last to mature
D)the brain has not learned to control breathing
21

Which of the following is not typical of passive aging?
A)degeneration of connective tissue elastin
B)increased acuity of senses
C)accumulation of DNA errors
D)lipid breakdown
22

True or false. Differences that enable females to outlive males may begin very early in development.
A)True
B)False





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