A bony fish that lives in the marine environment that was once thought to be extinct is the:

a. coelacanth.
b. African lung fish.
c. sturgeon fish.
d. mud skipper.
e. puffer fish.


A

Biology & Microbiology

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Cross-bridges form between _____ and _____ during muscular contraction.

A. actin, myosin B. actin, tropomyosin C. myosin, troponin D. myosin, tropomyosin E. troponin, calmodulin

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When an individual of dominant phenotype but unknown genotype is crossed with one that is homozygous recessive, this is called a ________

a. testcross b. monohybrid cross c. codominant cross d. dihybrid cross

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Which description illustrates an amphipathic molecule?

a. A phospholipid with two polar ends b. A phospholipid with two hydrophobic ends c. A phospholipid with only one hydrophilic end

d. A phospholipid with only one hydrophobic end e. A phospholipid with both a hydrophobic end and a hydrophilic end

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Which of the following best describes a biome?

A) three different classes of ecosystems based on high, medium, or low rainfall B) three different classes of ecosystems based high, medium, or low temperature C) small terrestrial regions with similar climate and the similar communities of organisms D) large terrestrial regions with similar climate and similar types of plant life

Biology & Microbiology