The concept that living organisms arise from nonliving material is called ________.
A. cell theory
B. germ theory
C. spontaneous generation
D. biogenesis
Answer: C
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Select the mismatched pair of Phylum Mollusca classes and their examples.
A. Polyplacophora—chitons B. Gastropoda—slugs C. Bivalvia—snails D. Cephalopoda—nautilus E. Gastropoda—nudibranchs
This animal does not have a brain but rather
has a nerve net of interconnected neurons. This animal is
a. a planarian. b. an earthworm. c. a grasshopper. d. a sea anemone. e. more than one of these
When guard cells are filled with water,
a. stomata are open. b. stomata are closed. c. sugars diffuse into the sieve tube members. d. gases cannot diffuse into or out of the plant. e. more than one of these take place.
A species has n=4 chromosomes. Genes on the same chromosome have a maximum recombination recombination rate of:
a. 100% b. 75% c. 50% d. 25% e. 0%