When and where did the first multicellular protists evolve?

A. Canada, 1.4 BYA
B. Middle East, 4.6 BYA
C. Africa, 2.3 BYA
D. Asia, 3.2 BYA


Answer: A

Biology & Microbiology

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Large ears is a rare trait in a mainland population of mice.  A female mice homozygous for very large ears arrives at an island that already contains mice after sneaking onto a boat. This will lead to a population with a higher incidence of big ears than the mainland population because of ____  

A.  increased mutation. B.  a bottleneck effect. C.  genetic drift. D.  natural selection. E.  gene flow.

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A(n) __________ dominates bryophyte life cycles. Fill in the blank(s) with the appropriate word(s)

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Endothermy costs energy

a. true b. false

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dental caries are a direct result of

What will be an ideal response?

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