The letter “B” in the above figure represents
a. humerus
b. pectoral girdle
c. skull
d. sternum
e. pelvic girdle
Answer: a
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The chemical nature of exotoxins is that of a
A. protein. B. carbohydrate. C. lipid. D. lipopolysaccharide.
As a young child, you preferred to collect shells and insects, dig through the mud around a pond, and
watch birds rather than play video games. What did you have in common with Charles Darwin?
a. an interest in history b. an interest in evolution c. an interest in natural history d. an interest in geology e. an interest in biogeography
The Euphorbia of desert parts of Africa and India are succulent and have thorns but are superficially very similar to the unrelated cacti native to the deserts of the Americas. This pair of plant groups represents an example of ________
A) convergent evolution B) apostatic selection C) homology D) divergent evolution
Secondary phloem
A. is part of the inner bark. B. primarily stores carbohydrates. C. includes live companion cells and dead sieve cells. D. encompasses more stem volume than secondary xylem. E. is produced by the cork cambium.