In multicellular organisms, the mechanism most directly responsible for directing development and maintaining homeostasis is gene

A. regulation.
B. duplication.
C. deletion.
D. mutation.


Answer: A

Biology & Microbiology

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The 1997–1998 El Niño resulted in all of the

following EXCEPT a. crop failures and wildfires in Australia and Indonesia. b. the death of many seals and sea lions. c. massive flooding and landslides. d. a massive ice storm in the southwestern United States. e. massive flooding in California and Peru

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____ is denser than ____

a. Heartwood; sapwood b. Heartwood; softwood c. Sapwood; hardwood d. Sapwood; heartwood e. Softwood; hardwood

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Which vitamin, taken in amounts higher than the recommended upper limit, can have positive effects on blood lipid levels?

a. biotin b. thiamin c. vitamin D d. niacin

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What two processes results in genetically-different products?

a)mitosis and meiosis b)mitosis and asexual reproduction c)meiosis and asexual reproduction d)meiosis and sexual reproduction e)mitosis and sexual reproduction

Biology & Microbiology