The basal group in clade Eumetazoa is __________.
a. Ectoprocta
b. Mollusca
c. Ctenophora
d. Porifera
e. Annelida
Answer: c. Ctenophora
Biology & Microbiology
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A species that has population levels so low it faces
extinction in all or part of its range is designated as a. riparian. b. endemic. c. endangered. d. fragmented. e. an indicator.
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A linear depiction of energy flow in an ecosystem is:
a. a food web. b. a food chain. c. a trophic web. d. an ecological pyramid. e. a pyramid of numbers
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Steroid hormones act more slowly and maintain their effects longer than peptide hormones.
Answer the following statement true (T) or false (F)
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