Which of the following mechanisms are causal explanations for bird song?

A. Young males learned their song from their
fathers.
B. Songs are used by males to attract a mate.
C. The ritualization of the vocalization
became species specific.
D. Air passing through a bird's specialized
singing organ, the syrinx, vibrates the
surrounding organs.


D

Biology & Microbiology

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Which of the following is the correct order of

the three lines of defense?

a. barriers that exclude pathogens>>adaptive immunity>>innate immunity b. barriers that exclude pathogens>>innate immunity>>adaptive immunity c. innate immunity>>adaptive immunity>>barriers that exclude pathogens d. apaptive immunity>>barriers that exclude pathogens>>innate immunity e. apative immunity>>innate immunity>>barriers that exclude pathogens

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Which of the following statements is supported by the evidence from the tree

A. All the anole species in this tree do not share a common ancestor. B. Anolis coelestinusis more closely related to Leiocephalus carinatusthan to any other anole species. C. Anolis coelestinusis the oldest anole species. D. The anole species on Puerto Rico and Hispaniola evolved from a common ancestor.

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Which mRNA below would code for a premature stop codon from the following amino acid sequence? N—Met-Gln-Leu-Arg-Cys—C

A) 5? - AUG CAG AUA GCG UGC UAG - 3? B) 5? - AUG AAG UUA GCG UGC UAG - 3? C) 5? - AUG CAG UAA GCG UGC UAG - 3? D) 5? - AUG CAG UUA UUG UGC UAG - 3? E) 5? - AUG CAG UUA GCG UGC AAG - 3?

Biology & Microbiology

Reducing medium is used to isolate ________ microbes

A) fastidious B) obligate aerobic C) autotrophic D) obligate anaerobic E) intracellular parasitic

Biology & Microbiology