Precursor-mRNA (pre-mRNA) typically exists
a. only in prokaryotes.
b. in both the nucleus and cytoplasm of eukaryotes.
c. only in the cytoplasm of eukaryotes.
d. in both prokaryotes and eukaryotes.
e. only in the nucleus of eukaryotes.
E
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Perhaps a plant's greatest liability is its inability to ____
a. produce growth hormones b. use aerobic respiration c. move when conditions around it deteriorate d. produce its own lipids and proteins e. respond to dwindling supplies of nutrients and water
If all offspring of a cross have the genotype Aa, the
parents of the cross are most likely a. AA x aa. b. Aa x Aa. c. Aa x aa. d. AA x Aa. e. none of these.
DNA is a double-stranded molecule and RNA is a single-stranded molecule.
a. true b. false
How does the environment limit population growth?
What will be an ideal response?