#Question id: 5659
#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?
#Question id: 7301
#Unit 5. Developmental Biology
An Rajasthani hunter was worried about being attacked by grizzly tigers, so he left the lights in his cabin on all the time. Plants near the cabin flowered a month early. Which of the following best explains this?
#Question id: 11657
#Unit 10. Ecological Principles
In the following diagram, three models succession are represented. In this diagram A,B,C and D are the species and arrows indicate replaced by
Based on the above, which statement is correct.
#Question id: 3012
#Unit 2. Cellular Organization
Agar is a sulfated polymer
#Question id: 3019
#Unit 2. Cellular Organization
During which phase of growth are bacteria most susceptible to antibiotics?