Which term describes one or more communities interacting with each other and the physical environment through the
flow of energy and cycling of materials?
a. meta-community
b. habitat
c. biome
d. ecosystem
e. niche
ANSWER: d
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What is the main reason for using food webs instead of food chains in analyzing ecosystems?
I) Most organisms eat more than one type of food. II) Most organisms feed at several trophic levels. III) The decomposition cycle needs to be shown. A) only I B) only II C) only III D) only I and II E) I, II, and III
When RNA polymerase catalyzes the addition of a nucleotide to a growing mRNA chain, a byproduct of this reaction is
A. pyrophosphate. B. water. C. orthophosphate. D. phosphate.
The earth spins
a. fastest at 60 degrees latitude. b. fastest at the equator. c. fastest at 90 degrees latitude. d. fastest at 30 degrees latitude. e. at an equal speed at all points.
How would acidification of seawater affect marine organisms? Acidification of seawater would _____
A) increase dissolved carbonate concentrations and promote faster growth of corals and shell-building animals B) decrease dissolved carbonate concentrations and promote faster growth of corals and shell-building animals C) increase dissolved carbonate concentrations and hinder growth of corals and shell-building animals D) decrease dissolved carbonate concentrations and hinder growth of corals and shell-building animals