An mRNA codon consists of ___ bases
1.1
2.2
3.3
4.4
3
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Enzymes function by
(a) being consumed (used up) in the reaction. (b) lowering the activation energy of a reaction. (c) combining with otherwise toxic substances in the cell. (d) adding heat to the cell to speed up the reaction
True-breeding red flowers are crossed with true-breeding white flowers, and all of the offspring are pink. What kind of inheritance is this?
a. codominance b. polyploidy c. incomplete dominance d. homozygous recessive
In mammals, the glomerulus is located within the
a. distal convoluted tubule. b. Bowman's capsule. c. descending segment of the loop of Henle. d. proximal convoluted tubule. e. ascending segment of the loop of Henle.
Which species represent an early stage in primary succession?
a. pine trees b. moss and lichens on bare rock c. weedy annual plants in an open field d. ferns e. deciduous trees