A major change that occurred during the evolution of plants from their algal ancestors was the origin of a branched sporophyte. What advantage would branched sporophytes provide in this stage of the life cycle?
A) increased gamete production
B) increased spore production
C) increased potential for independence of the diploid stage from the haploid stage
D) increased fertilization rate
E) increased size of the diploid stage
Ans: B) increased spore production
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Which is the predominant second messenger
involved in regulating glucose metabolism?
a. ATP b. ADP c. mRNA d. cAMP e. NADH
Closely related or similar species are grouped into a single:a
class. b. phylum. c. order. d. genus e. family.
Hemocyanin:a
combines irreversibly with oxygen for transport within the body of various organisms. b. is bright red in color when combined with oxygen. c. has an iron-porphyrin group that is responsible for oxygen transport. d. is a respiratory pigment found in the blood of some invertebrate and vertebrate species. e. is a respiratory pigment that is colorless when deoxygenated.
The accompanying figure is a good illustration of:
a. bioconcentration.
b. biological magnification.
c. persistence.
d. narrow-spectrum botanicals.
e. the pesticide treadmill