A point mutation alters
A) a single base.
B) a chromosome tip.
C) a centromere.
D) only a purine.
A) a single base.
You might also like to view...
Eight hundred million years ago, what change in atmospheric conditions coincided with an increase in eukaryotic diversity?
A. decrease in CO2 B. increase in O2 C. increase in sulfur D. None of these choices are correct.
________ RNA is a component of the ribosomes that serve as the site of protein synthesis.
Fill in the blank(s) with the appropriate word(s).
A big obstacle preventing the protection of coastal wetlands is:
a. lack of laws protecting wetlands. b. lack of interested groups. c. politically-motivated decisions to change the definitions of wetlands. d. lack of scientific understanding about the ecosystems. e. none of the above.
Which of the following organs of the endocrine system secretes several hormones and stores two
hormones produced by the hypothalamus? a. pituitary gland b. pancreas c. pineal gland d. adrenal glands e. thyroid gland