20. Development
Animal Development
20. Development
Animal Development
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- Multiple ChoiceThe development of a zygote into a blastula is called __________.990views1rank
- Multiple ChoiceWhich stage of development is common in amphibians but not seen in mammals?659views
- Multiple ChoiceWhich of the following describes the correct sequence of stages during embryogenesis?699views
- 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 __________.724views1rank
- 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.
1050views - 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
543views - Textbook Question
The archenteron develops into a. the mesoderm. b. the endoderm. c. the placenta. d. the lumen of the digestive tract.
1070views - 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
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