Speciation that occurs in bird populations that nest on either side of a river could be an example of ________speciation.

A. divergent
B. parapatric
C. allopatric
D. convergent
E. sympatric


Answer: B

Biology & Microbiology

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In systemic acquired resistance, the regulatory protein NPR-1 moves from the cytoplasm to the cell

nucleus, apparently in response to a buildup of ____ in the cytoplasm.

a. ethylene b. brassinosteroids c. oligosaccharins d. jasmonates e. salicylic acid

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In which animal's development does the rotation of the gray crescent play a major role?

a. bird b. frog c. grasshopper d. human e. sea urchin

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Oxidation of nutrients by cells results in

A) a release of energy, which is released by converting ATP to ADP. B) a requirement for energy which can be used to recharge ADP to ATP. C) a requirement of energy which can be obtained by converting ATP to ADP. D) a release of energy, which can be used to recharge ADP to ATP. E) either a release or a requirement for energy depending on what type of nutrient is available.

Biology & Microbiology

All angiosperms have

A. animal pollinators. B. scented flowers. C. fleshy fruits for dispersal. D. nectaries. E. ovules enclosed in carpels.

Biology & Microbiology