Which of the following stimulates the secretion of parathyroid hormone (PTH)?

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#Question id: 31328

#Unit 3. Fundamental Processes

Which of the following is correct about Pseudo-okazaki fragments

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#Question id: 4615

#Unit 11. Evolution and Behavior

Currently, two of the living elephant species (X and Y) are placed in the genus Loxodonta, and a third surviving species (Z) is placed in the genus Elephas. Assuming this classification reflects evolutionary relatedness, which of the following is the most accurate phylogenetic tree?

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#Question id: 1495

#Unit 4. Cell Communication and Cell Signaling

In some breast cancers, estrogen acts as a(n):

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#Question id: 10703

#Unit 10. Ecological Principles

Keystone predators can maintain species diversity in a community if they

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#Question id: 28303

#Unit 5. Developmental Biology

Capacities of the sperm gain after capacitation involve__

a) CatSper calcium channels to sense calcium influx and monitor the direction of the current

b) recognizing the cues that will guide them to the egg

c) undergoing the acrosome reaction

d) fusing with the egg cell membrane