Following are the statements related to mammalian chaemotaxis:

A. During chaemotaxis, the oocyte and its accompanying cumulus cells secrete molecules that attract only uncapacitated sperm toward the egg during the last stages of sperm migration.

B. These chaemotactic compound are hormone progesterone, which is made by the cumulus cells.

C. Progesterone has been shown to bind to a receptor that activates Ca2+ channels in the cell membrane of the sperm tail, leading to sperm hyperactivity and provides directional cue.

D. Cumulus cells also secrete a substance, CRISP1, that attracts sperm and hyperactivates them through CatSper channels similar as in sea urchins.

Which of  the following statement is incorrect?

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#Question id: 4577

#Unit 11. Evolution and Behavior

Which of these is a statement that Darwin would have rejected?

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#Question id: 19453

#Unit 13. Methods in Biology

What will be the value of resolution when the angle given is 60O  and R.I. given is 1.3 at 340nm?

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#Question id: 11573

#Unit 7. System Physiology – Animal

Removing which of the following glands would have the most wide-reaching effect on bodily functions of an adult human?

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#Question id: 24574

#Unit 10. Ecological Principles

If number of birds in the population N0= 100 next year ecologists count 110 birds in the same population, consider a population of birds growing at a rate of 5% per year. After 5 years how many birds would there be?

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#Question id: 1578

#Unit 4. Cell Communication and Cell Signaling

Function of TH2