Which of the following structures is an essential part of most fungal reproductive systems?
A) gametangia
B) cellulose
C) seeds
D) spores
Answer: D
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An important grazer of kelp plants is the:
a. octopus. b. kelp bass. c. sea urchin. d. sea otter. e. sea anemone.
Edward Jenner's work involved
A. inoculation of dried pus from smallpox pustules into a person to stimulate immunity. B. immunization using a related, less pathogenic organism to give protection against a more pathogenic one. C. development of an immunization to protect people against cowpox. D. development of passive immunotherapy.
Speciation occurs more frequently when populations undergo a period of geographic isolation
a. true b. false
When the ribosome reaches a nonsense codon, which of the following occurs?
A) a methionine is incorporated B) the polypeptide is released C) a peptide bond forms D) the A site binds to a charged tRNA