Chemical signals that mediate interactions between two or more members of a given species are called ________.

A. alarm signals
B. competitive exclusions
C. hormones
D. pheromones


Answer: D

Biology & Microbiology

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The rate of exchange of carbon between the atmosphere and the oceans represents a carbon:

A. sink. B. reservoir. C. biomass. D. precipitation. E. flux.

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Which animal taxon is named for the cuticle or external skeleton that its members secrete and periodically molt?

a. Deuterostomia b. Ecdysozoa c. Reptilia d. Lophotrochozoa e. Protostomia

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Which of the researchers that elucidated the structure of DNA did not receive a Nobel Prize?

a. Wilkins b. Franklin c. Crick d. Watson e. All 4 received the Nobel.

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C4 plants divide photosynthesis between two types of cells: the mesophyll and the ________ cells

Fill in the blank(s) with correct word

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