1
A) archenteron B) primitive streak C) gastrocoel D) amnion 2
A) sensory organs of the head B) skeletal muscles C) peripheral nerves D) the spinal column 3
A) retina B) lens C) cornea D) iris 4
A) embryonic stages of an animal resemble adult ancestors B) adults of an animal resemble embryonic stages of its ancestors C) adult animals resemble adult ancestors D) embryonic stages of an animal resemble embryonic stages of its ancestors 5
A) occurs in birds but not in mammals B) is an outgrowth of the amnion in all animals producing it C) contributes blood vessels to the umbilical cord in mammals D) becomes the placenta in mammals 6
A) the archenteron B) the primitive streak C) the dorsal lip D) blastomeres E) placodes 7
A) coccyx B) trophoblast C) endometrium D) yolk plug E) lanugo 8
A) first week B) first month C) first trimester D) second trimester E) third trimester 9
A) gastrula B) archenteron C) blastomere D) animal pole E) blastocoel 10
A) chorion B) amnion C) allantois D) yolk sac E) egg shell 11
A) acrosome B) morula C) zona pellucida D) gray crescent E) trophoblast 12
A) before the female is born B) just before ovulation C) after sperm penetration D) after cleavage has begun E) after implantation in the uterus 13
A) rapid cell division B) rapid growth in the size of the embryo C) each cell having the same components as its neighbors D) all of the above E) none of the above 14
A) placodes B) blastodisc C) trophoblast D) yolk 15
A) mammal B) amphibian C) bird D) reptile E) fish 16
A) cleavage B) blastulation C) neurulation D) fertilization E) gastrulation 17
A) vegetal pole B) primitive streak C) archenteron D) blastocoel E) somites 18
A) dorsal lip B) blastopore C) primitive streak D) all of the above are associated with the site E) none of the above is associated with the site 19
A) ectoderm B) mesoderm C) endoderm D) all of the above 20
A) somites B) neural tube C) neural crest D) adrenal medulla E) rubella 21
A) archenteron B) primitive streak C) coccyx D) notochord E) neural crest 22
A) first week B) second week C) third week D) fourth week E) second trimester 23
A) oxytocin B) prostaglandins C) both of the above D) none of the above 24
A) lanugo B) colostrum C) rubella D) afterbirth E) thalidomide 25
A) 250 per day B) 250,000 per minute C) 25 million per minute D) 25,000 per second 26
A) an embryo with 4 cells B) an embryo with a darkly pigmented vegetal hemisphere C) a collection of 16-32 cells resembling a raspberry D) a group of cells that do not undergo DNA replication E) a hollow ball of cells enclosing a fluid filled space 27
A) to keep the embryo moist B) to exchange oxygen and carbon dioxide with the environment C) to absorb nutrients stored in yolk D) to store nitrogenous waste 28
A) allantois B) amnion C) chorion D) endometrium E) umbilical cord 29
A) excretory organ. B) respiratory organ. C) endocrine organ. D) all of the above. E) a and b, but not c. 30
A) cleavage B) gastrulation C) the formation of the blastocyst D) neurulation E) none of the above 31
A) True B) False 32
A) True B) False 33
A) True B) False 34
A) True B) False 35
A) True B) False 36
A) True B) False 37
A) zygote B) gastrula C) morula D) larva E) blastula 38
A) ectoderm B) endoderm C) epiderm D) mesoderm E) notoderm 39
A) respiratory system B) digestive system C) skeletal muscles D) reproductive system E) smooth muscles 40
A) ectoderm B) endoderm C) epiderm D) mesoderm E) notoderm 41
A) are equal in size to that of the original zygote B) become smaller and smaller C) grow larger and larger D) migrate to positions of future development E) begin immediate differentiation 42
A) ectoderm B) endoderm C) epiderm D) mesoderm E) notoderm 43
A) fistula B) blastula C) gastrula D) morula E) planula 44
A) anal B) gastric C) oral D) interstitial E) neural
2002 McGraw-Hill Higher Education