While on the H.M.S. Beagle, Darwin observed that ____
a. organisms on the Galápagos Islands resembled species on the mainland
b. armadillos and glyptodonts coexisted in some habitats but not others
c. similar organisms colonized similar habitats in South America and Europe
d. organisms in different South American habitats resembled each other, but did not resemble organisms in
similar European habitats
e. no organisms resembled fossilized extinct animals
ANSWER: d
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Hydrogen ion flow out of the thylakoid compartments ____
a. occurs between photosystems I and II b. is called the hydrogen transfer system c. provides energy to produce ATP molecules d. causes excitation of chlorophyll molecules e. requires the intermediary action of acceptor molecules
The fly agaric, a giant toadstool, consumes dead organic material, so it is said to be a(n) ________
Fill in the blank(s) with correct word
The bacterial genome often consists of a single chromosome that carries all of the essential genes and one or more varieties of plasmid that generally carry non-essential genes.
a. true b. false
As cleavage continues, a zygote forms into a solid multicellular ball called a(n)
A) endometrium. B) morula. C) trophoblast. D) gastrula. E) blastula.