Small pieces of DNA can be amplified by a process known as polymerase chain reaction
Indicate whether the statement is true or false
TRUE
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In the figure above, which DNA fragment is the smallest?
a. A b. B c. C d. D e. E
Using the labels in the accompanying figure, where are chloroplasts found in the greatest density?
a. 1 and 2
b. 3 and 4
c. 4 and 5
d. 6 and 7
e. 7 and 8
Why does a typical fish die quickly when it is removed from water?
A) Oxygen diffuses more rapidly in water than it does in air. B) The gills collapse and dry out in the air. C) Water contains more oxygen, per unit volume, than does air. D) Gills split water molecules into hydrogen and oxygen, which is used for cellular respiration.
Which of the following is mismatched?
A. Gracilicutes - gram-negative cell walls B. Firmicutes - gram-positive cell walls C. Tenericutes - waxy acid fast cell walls D. Mendosicutes - archaea cell walls E. None of the choices is correct.