The skin is an example of a(n)

A) tissue.
B) cell.
C) undifferentiated mass.
D) organ system.
E) organ.


E

Biology & Microbiology

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Which of the following is not a function of the fruit?

A. protecting seeds B. aiding in the dispersal of seeds C. attracting pollinators

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When the immune system no longer recognizes self-antigens what can result?

a. complement activation b. allergy attack c. autoimmune disorder d. hypersensitivity

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A tRNA with the anticodon sequence 5? IUC 3? will not normally exist because

A) 5? GAU 3? and 5? GAC 3? specify asparagine, but 5? GAA 3? specifies glutamic acid. B) 5? GAU 3? and 5? GAC 3? specify different amino acids. C) I is not a base present in tRNAs. D) 5? GAU 3? and 5? GAC 3? both specify asparagine.

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________ are peptide hormones derived from tyrosine and tryptophan.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology