The most abundant type of fish is:
a. cartilaginous
b. ray-finned.
c. jawless.
d. lobefin.
b
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Refer to the figure above (first three rows of the periodic table). What element has properties most similar tocarbon?
A) boron B) silicon C) nitrogen D) aluminum E) phosphorus
Which of the following may be a reason for bacteria not having nucleosomelike structures?
A. Bacteria need to respond quickly to the environment and therefore need ready access to the genome. B. Cell division in bacteria occurs in as little as 15 minutes. C. A much larger proportion of the bacterial chromosome codes for proteins. D. Higher rates of metabolism in bacteria mean that a much larger proportion of the DNA is being transcribed or replicated at a given time. E. All of these choices are correct.
Active transport can only move a substance with a concentration gradient
1.True 2.False
Four of the five enzymes listed below are used in genetic engineering. Select the exception
a. ligase b. reverse transcriptase c. restriction d. replicase e. DNA polymerase