#Question id: 2625
#Unit 2. Cellular Organization
positive regulation is applied when
#Question id: 10507
#Unit 6. System Physiology – Plant
Rhizobacteria function as
#Question id: 15489
#Unit 12. Applied Biology
#Question id: 5671
#Unit 5. Developmental Biology
Match the following mechanism of polyspermy (Column I) with events (Column II).
Column I |
Column II |
A. Fast block to polyspermy |
i. chemicals from the fusing sperm cytoplasm alter the sodium ion (Na+) channels on the membrane |
B. Slow block to polyspermy |
ii. enzyme cortical granule serine protease, cleaves the protein posts that connect the vitelline envelope |
iii the concentration of free Ca2+ in the egg cytoplasm increases |
|
iv. an electric change in the egg cell membrane |
|
v. the concentration of free Na+ in the egg cytoplasm increases |
Which of the following is correct?
#Question id: 10981
#Unit 7. System Physiology – Animal
Which of the following structures will have the slowest rate of conduction of the cardiac action potential?