In a cell signalling pathway there can be more than one sensor.

a. true
b. false


Ans: a. true

Biology & Microbiology

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Natural colonization can happen in all of the following ways except 

A. a flock of birds gets blown off course. B. a bird eats a fruit on the mainland and defecates the seed on an island. C. people plant new species on an island. D. lowered sea levels connect two areas previously isolated. E. birds pick up seeds on their feet while wading in mud and drop them elsewhere.

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Which of the following is NOT a way that many terrestrial ectotherms regulate their temperature?

a. moving into or out of the shade b. panting c. changing the angle of the body relative to the sun d. changing blood flow to the skin e. thermoregulation

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Describe the positioning of heartwood versus sapwood

What will be an ideal response?

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Which most completely describes the circumstances under which yarrow will alter its phenotype?

a. temperature, soil conditions and water conditions b. soil conditions only c. being produced by sexual versus asexual reproduction d. water conditions only e. asexual reproduction, soil conditions, and water conditions

Biology & Microbiology