#Question id: 4578
#Unit 11. Evolution and Behavior
Which definition of evolution would have been most foreign to Charles Darwin during his lifetime?
#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: 17810
#Unit 11. Evolution and Behavior
#Question id: 370
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following statements is true about buffer solutions?
#Question id: 5222
#Unit 11. Evolution and Behavior
When does exon shuffling occur?