The double helix of DNA is composed of building blocks called
A. amino acids.
B. monosaccharides.
C. phospholipids.
D. disaccharides.
E. nucleotides.
E. nucleotides.
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The final step in the scientific method for a scientist is ____
a. devising an experiment b. collecting data c. making observations d. report his or her results e. researching the literature for similar investigations
This graph shows both human birth weight and
newborn infant mortality. The most common birth weight is between seven and eight pounds. Human birth weight seems to be an example of a. directional selection. b. stabilizing selection. c. sexual selection. d. disruptive selection. e. artificial selection.
What major feature allows primates to grasp objects?
a. jointed appendages b. an opposable thumb c. an enlarged foramen magnum d. a forelimb with four digits e. a large brain
What term refers to an individual who has two copies of the same allele?
What will be an ideal response?