Which statement is false with regard to mutations?
a. They are always dangerous.
b. They can occur as DNA replication errors.
c. They cannot be repaired after replication.
d. They may become cancerous.
e. They can be passed on to the next generation.
ANSWER: a
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An agent that increases mutation rate is a ____
Fill in the blank with the appropriate word.
Slow-growing NTM whose colonies are pigmented when grown in the dark or the light are referred to as:
a. scotochromogens. b. photochromogens. c. nonphotochromogens. d. chromogenicums.
Based on this graph of vascular plant species on a volcanic island, at what point would you hypothesize that sea gulls began nesting on the island?
1.1998
2.1973
3.1965
4.1986
Exposure to which of the following chemicals is correlated with low birth weight and premature birth?
A) the plasticizer di(2-ethylhexyl)phthalate (DEHP) B) bisphenol A (BPA) C) the synthetic estrogen diethylstilbestrol (DES) D) polychlorinated biphenols (PCBs)