This task contains 7 questions.
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| | The cortical reaction the sea urchin egg functions straight in |
| | the generation the an electrical impulse by the egg.
You are watching: The cortical reaction of sea urchin eggs functions directly in
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| the blend of egg and also sperm nuclei. |
| the release of hydrolytic enzyme from the sperm. |
| the production of a rapid block to polyspermy. |
| the formation of a fertilization envelope. |
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| | Which of the following is usual to the development of both birds and mammals? |
| | yolk plug |
| trophoblast |
| holoblastic cleavage |
| gray crescent |
| epiblast and hypoblast |
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| | The archenteron develops into |
| | the placenta. |
| the endoderm. |
| the lumen of the digestive tract. |
| the blastocoel. |
| the mesoderm. |
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| | What structure adaptation in chickens enables them come lay your eggs in arid settings rather 보다 in water? |
| | development of the mind from ectoderm |
| gastrulation |
| cleavage |
| yolk |
| extraembryonic membranes |
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| | In one egg cell treated through EDTA, a chemical that binding calcium and magnesium ions, |
| | the fertilization envelope would not form. |
| the quick block come polyspermy would not occur. |
| the zygote would certainly not save on computer maternal and also paternal chromosomes. |
| the fusion of sperm and also egg nuclei would be blocked. |
| the acrosomal reaction would certainly be blocked. |
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| | In humans, similar twins are feasible because |
| | convergent extension occurs. |
| cytoplasmic factors are dispersed unevenly in unfertilized eggs. |
| extraembryonic cells connect with the zygote nucleus. |
| the gray crescent divides the dorsal-ventral axis into brand-new cells. |
| early blastomeres can type a complete embryo if isolated. |
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