Life apparently originated on Earth about 

A. 1 million years ago.
B. 6000 years ago.
C. 4.5 billion years ago.
D. 8 billion years ago.
E. 3.5 billion years ago.


E. 3.5 billion years ago.

Biology & Microbiology

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Four of the five answers listed below are periods of the same cycle. Select the exception

a. G1 b. M c. R d. S e. G2

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Herbaceous vegetation such as reeds, sedges, grasses, and cattails typically grow in freshwater

A) marshes. B) swamps. C) riparian woodlands. D) peatlands or mires.

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The most serious form of pelvic inflammatory disease (PID) causes

a) septicemia. b) salpingitis. c) toxemia. d) pyelonephritis.

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