A food web is
A. a long food chain.
B. several food chains that intersect.
C. a trap to catch food.
D. a complicated series of passages of energy via the first law of thermodynamics.
B. several food chains that intersect.
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True or false: The specialized salt glands that allow marine birds to drink sea water are found in the nasal cavity; in humans, these glands are found in the esophagus
A. true B. false
Escherichia coli is a good indicator of fecal contamination of water supplies.
Answer the following statement true (T) or false (F)
____ reproduction generates more ____ than does ____ reproduction
a. Asexual; genetic diversity; sexual b. Sexual; genetic stability; asexual c. Sexual; genetic diversity; asexual d. Asexual; haploid cells; sexual e. Sexual; identical offspring; asexual
All of the characteristics are seen only in mammals except:a
hair. b. mammary glands. c. three middle ear bones. d. incisors, canines, premolars, and molars. e. diapsid skull.