Which of the following represents the pattern of energy flow within an ecosystem?
a. producers ? consumers ? decomposers
b. decomposers ? producers ? consumers
c. consumers ? producers ? decomposers
d. decomposers ? consumers ? producers
e. producers ? decomposers ? consumers
A
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Crossing over during mitosis increases genetic diversity during:
A. parasexual reproduction. B. asexual reproduction. C. sexual reproduction. D. asexual and parasexual reproduction only. E. sexual and parasexual reproduction only.
True or false: Kidneys are well adapted for osmoregulation because they receive a large fraction of the blood leaving the heart at each heartbeat
A. true B. false
Development of the anchor cell in the vulva in the nematode C. elegans is the result of ________
A) specific upregulation of the Delta protein B) specific upregulation of the LIN-12 protein C) stochastically increased production of Delta protein D) stochastically increased production of the LIN-12 protein
Why doesn't a tapeworm have a mouth on its scolex?
A. The mouth is located at the end of the pharynx. B. Tapeworms use a radula instead of a mouth to feed. C. Endoparasites don't need a mouth. D. The mouth is on the proglottids.