Which of the following lack vascular tissue?
A) cone-bearing plants
B) grasses
C) ferns
D) mosses
D
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Match the terms with the best description. _____ base pair substitution _____ promoter _____ polysome _____ exon _____ genetic code _____ intron _____ base pair deletion
a. protein-coding segment b. causes a shift in the mRNA reading frame c. may result in the replacement of one amino acid for another d. removed before translation e. many ribosomes translating the same mRNA f. complete set of 64 codons g. binding site for RNA polymerase
Ivan Valiela's hypothesis that the growth of salt marsh grass is limited by nitrogen availability was:
a. disproved by the growth of larger and taller grass in his control (nitrogen-fertilized) plots. b. disproved by the growth of larger and taller grass in his experimental (nitrogen-fertilized) plots. c. supported by the growth of larger and taller grass in his experimental (nitrogen-fertilized) plots. d. supported by the growth of larger and taller grass in his control (nitrogen-fertilized) plots. e. unsupported by a poor experimental design.
A survivorship curve similar in shape to that seen in humans might be expected to be seen in
a. elephants. b. domestic cows. c. whales. d. a rhinoceros. e. any of the above.
Which vitamin is water soluble and cannot be synthesized by the body?
A) A B) C C) E D) K