The large-scale patterns, trends, and rates of change among groups of species is
a. microevolution.
b. macroevolution.
c. species variation.
d. population shift.
e. population drift.
B
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Eukaryotic mRNA molecules may contain non-coding sequences that must be removed before translation. These are called
A. anticodons. B. introns. C. exons. D. nucleosomes. E. noncodons.
Dietary treatment of galactosemia ____
a. need not begin until one or two months after birth b. consists of very low protein intake c. can usually be discontinued by the age of twelve d. completely eliminates symptoms of the disease e. should be started within a few days after birth
A(n) ________ directs the making of a protein
Fill in the blank(s) with correct word
Which of the following statements about DNA is FALSE?
A. A eukaryotic genome is made up of many DNA molecules. B. A strand of DNA is made up of many nucleotides. C. One chromosome is made up of many DNA molecules. D. A DNA double helix contains both covalent bonds and hydrogen bonds. E. All of these are TRUE.