#Question id: 11667
#Unit 7. System Physiology – Animal
Which of the following is characteristic of juxtamedullary nephrons?
#Question id: 5671
#Unit 5. Developmental Biology
Match the following mechanism of polyspermy (Column I) with events (Column II).
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Column I |
Column II |
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A. Fast block to polyspermy |
i. chemicals from the fusing sperm cytoplasm alter the sodium ion (Na+) channels on the membrane |
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B. Slow block to polyspermy |
ii. enzyme cortical granule serine protease, cleaves the protein posts that connect the vitelline envelope |
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iii the concentration of free Ca2+ in the egg cytoplasm increases |
|
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iv. an electric change in the egg cell membrane |
|
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v. the concentration of free Na+ in the egg cytoplasm increases |
Which of the following is correct?
#Question id: 29037
#Unit 11. Evolution and Behavior
Selection Favors mating displays that maximize a male’s lifetime fitness, which of the following is correctly representing to the graph;
#Question id: 1480
#Unit 4. Cell Communication and Cell Signaling
In vertebrate cells, Bax or Bak is required for:
#Question id: 10220
#Unit 6. System Physiology – Plant
Thylakoid membranes contain a protein kinase that can phosphorylate a specific threonine residue on the surface of LHCII. How the kinase is activated?