In sea urchins, the "fast block" and the longer-lasting "slow block" to polyspermy, respectively, are
A. the acrosomal reaction and the formation of egg white
B. the cortical reaction and the formation of yolk protein
C. the jelly coat of the egg and the vitelline membrane
D. membrane depolarization and the cortical reaction

Question

23-08-2022
Biology

contestada

In sea urchins, the "fast block" and the longer-lasting "slow block" to polyspermy, respectively, are
A. the acrosomal reaction and the formation of egg white
B. the cortical reaction and the formation of yolk protein
C. the jelly coat of the egg and the vitelline membrane
D. membrane depolarization and the cortical reaction

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I need help question number 2

tanisharawat014 tanisharawat014 · Answer 1 · 2022-08-25T22:14:49+02:00

In sea urchins ,the "fast block" and the longer-lasting "slow block" to polyspermy ,respectively ,are membrane depolarization and the cortical reaction .

What are sea urchins ?

Sea urchins belongs to the animalia kingdom , Echinodermata Phylum, and Echinoidea class . they are small marine animals .

Sea urchins are spiny , globular . they have their habitat in coral reefs and rocky ocean floor . they are omnivores .they depend on algae for food . average life span of sea urchin is 15-200 years .

What is polyspermy ?

Polyspermy is the fertilization of egg by more than one sperm . diploid organisms normally contain two copies of each chromosome ,one from each parents .

This may occurs because sperms are too efficient at reaching and fertilizing ovum which leads to competition between sperms .

Learn more about sea urchins here:

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