What distinguishes one gene from another?
A) the order of amino acids of which the genes are made
B) the position of the gene on a chromosome
C) the length of the chromosome the gene is on
D) the order of bases in the gene
Answer: D
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Which scenario illustrates directional selection?
a. Elk that are smaller or larger than average are easier prey for predators than elk of approximately average size. b. Bright feathers allow birds to attract mates, dull feathers hide birds from predators, but semi-bright feathers convey no advantage. c. Rabbits with shorter ears become more common where cattle that favor grazing on taller grass over shorter grass are introduced. d. Wildlife living in a forest are displaced after a wildfire destroys their natural habitat.
Four of the five actions listed below are responses to
cold temperatures. Select the exception. a. vasoconstriction of peripheral blood vessels b. uncontrolled muscular contraction c. thermoreceptors send messages to the hypothalamus d. enhanced secretion of sweat glands e. increased metabolic reactions
The Chloroplastida (green algae) include a wide diversity of forms ranging from unicellular to colonial individuals.
Answer the following statement true (T) or false (F)
Which piece of laboratory equipment would be used to most accurately measure the volume of a liquid.
a. beaker b. balance c. test tube d. graduated cylinder