#Question id: 3379
#Unit 11. Evolution and Behavior
polymorphism is define existence of two or more form of same species within same population at the same time and place .polymorphism either balanced or transient depending upon type of natural selection which of the following reason for balanced genetic polymorphism
a. each morph has selective advantage at equal intensity
b. non of the morph has selective advantage over other
c. heterzygote superiority
#Question id: 61
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following correctly describes chemical equilibrium?
#Question id: 12631
#Unit 6. System Physiology – Plant
#Question id: 27127
#Unit 4. Cell Communication and Cell Signaling
#Question id: 5675
#Unit 5. Developmental Biology
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?