20. Development
Animal Development
20. Development
Animal Development
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- Multiple ChoiceThe development of a zygote into a blastula is called __________.1506views1rank
- Multiple ChoiceWhich stage of development is common in amphibians but not seen in mammals?1056views
- Multiple ChoiceWhich of the following describes the correct sequence of stages during embryogenesis?1072views
- Multiple ChoiceA sea urchin sperm penetrates the jelly coat of an egg and adheres to receptor proteins on the egg's surface as a result of __________.1038views1rank
- Textbook Question
The cortical reaction of sea urchin eggs functions directly in
a. The formation of a fertilization envelope.
b. The production of a fast block to polyspermy.
c. The generation of an electrical impulse by the egg.
d. The fusion of egg and sperm nuclei.
1485views - Textbook Question
Which of the following is common to the development of both birds and mammals?
a. Holoblastic cleavage
b. Epiblast and hypoblast
c. Trophoblast
d. Gray crescent
722views - Textbook Question
The archenteron develops into
a. The mesoderm.
b. The endoderm.
c. The placenta.
d. The lumen of the digestive tract.
1365views - Textbook Question
What structural adaptation in chickens allows them to lay their eggs in arid environments rather than in water?
a. Extraembryonic membranes
b. Yolk
c. Cleavage
d. Gastrulation
812views