Different clusters of related Galápagos finch species each occupy a somewhat different ____, a term that describes a
general way of life.
a. niche zone
b. adaptive zone
c. hybrid zone
d. novel habitat
e. disjunct habitat
ANSWER: b
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Which of the following types of tissue covers body tissues and lines internal cavities?
a. connective b. muscle c. nervous d. epithelial
Which plant is consumed by more people worldwide than any other crop?
a. wheat b. corn c. rice d. potatoes e. legumes
because an spermatogonia has 23 pairs of chromosomes, after the 2 divisions of meiosis the chromosome number is reduced to 11.5 in each sperm and therefore it takes 2 sperm to fertilize 1 egg
a. true b. false
The temperatures at the equator remain warm year round because
A) there are large oceans near the equator that absorb large amounts of heat. B) the sun shines longer over the equator than it does over other parts of Earth. C) Earth's rotation on a tilted axis creates more atmospheric friction at the equator. D) Earth's natural curvature places the equator nearer to the sun. E) sunlight strikes the equator relatively directly with little seasonal variation.