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