How many DNA triplets encode 60 amino acids?
A. 180
B. 30
C. 20
D. 60
Answer: C
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Which molecule is the main structural component of biological membranes?
a. starch b. triglyceride c. protein d. phospholipid e. steroid
Similar to animal cells, cells in some plant organs, such as leaves, flowers, and fruits, undergo ____ growth
a. determinate b. indeterminate c. lateral d. apical e. plastic
An individual with a large, high quality territory is likely to have
A) a reduced number of offspring. B) decreased male-male interactions. C) increased mating success. D) reduced resources.
When a farmer grows cotton containing the gene for Bt toxin, they often leave a strip of non-Bt cotton around the outside of the field for what reason? Select one:
a. to allow some rr bollworm caterpillars to survive b. to allow the non-Bt and Bt cotton plants to cross pollinate c. because the non-Bt cotton does not drive the moths and caterpillars to extinction d. because the non-Bt cotton grows better e. to allow some RR bollworm caterpillars to survive and limit selection pressure for resistance