How many times better is the resolution of the transmission electron microscope than the resolution of the scanning electron microscope?
A) 100
B) 1,000
C) 10,000
D) 100,000
A) 100
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Experiments have shown that increased nitrogen deposition may affect the composition of
communities of ____ fungi.
a. mycorrhizal b. club c. parasitic d. all e. lichen
Two species have homologous structures. What can we infer?
a. The structures are identical. b. The structures have the same function. c. The species have very different ancestors. d. The species are related by a common ancestry. e. The structures have the same function and they are identical.
What is cation exchange in plant roots?
What will be an ideal response?
Kin selection refers to
A) the selection of a mate. B) deciding which related animals can live in the colony. C) deciding which related animals can share the food. D) determining which related animals must live and which must die. E) an animal promoting the survival of the genes of its close relatives.