What is the relationship between calcium and PTH? 

a. When extracellular Ca2+ is decreased àCa2+ binding to the receptor àinhibits PTH secretion

b. When extracellular Ca2+ concentration is increased à Ca2+ binds to the receptor à activates phospholipase C àinhibits PTH secretion

c. When extracellular Ca2+ is decreased à Ca2+ doesn’t binds to the receptor àstimulates PTH secretion

d. When extracellular Ca2+ concentration is increased à Ca2+ binds to the receptor à activates phospholipase C àstimulates PTH secretion.

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#Question id: 23194

#Unit 13. Methods in Biology

The following are super-resolution techniques:

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#Question id: 11919

#Unit 10. Ecological Principles

Frequent disturbances could lead to failure of a community to reach a climax community as one seral stage keeps replacing itself, a condition known as

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#Question id: 11989

#Unit 10. Ecological Principles

If mayflies lay eggs on roads instead of in water, this behavior could involve which of the following? 

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#Question id: 11829

#Unit 6. System Physiology – Plant

The certain cyclic olefin compounds, have been shown to block ethylene breakdown without inhibiting ethylene action?

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#Question id: 5769

#Unit 8. Inheritance Biology

A hybrid allotetraploid species (2n = 60) was backcrossed to one of the suspected parents (2n = 30). When the F 1 underwent meiosis, the prophase chromosome configuration was examined. If the guess about the suspected parent is correct, what would the chromosome configuration look like?