The origin of indirect evidence of life, no recognizable fossils except bacteria (microfossils) was during which geological eras?

#Question id: 5834

#Unit 8. Inheritance Biology

When drastically damaged, the DNA in E. coli undergoes:

#Question id: 9576

#Unit 10. Ecological Principles

#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: 26436

#Unit 3. Fundamental Processes

Microsatellite instability is caused by the mutation in

#Question id: 11106

#Unit 7. System Physiology – Animal

The respiratory conducting passageways perform all of the following functions EXCEPT: