When an organism has two alleles at a particular locus that are different, the organism is called
a.) purebred.
B.) dominant.
C.) heterozygous.
D.) recessive.
Ans: C.) heterozygous.
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A structure found in cells of all three domains, prokaryotes and eukaryotes, is the
A. cilium. B. ribosome. C. cell wall. D. mitochondria. E. chloroplast.
If plant gene alterations cause plants to be deficient in photorespiration, what would most probably occur?
A) Photosynthetic efficiency would be reduced at low light intensities. B) Cells would carry on the Calvin cycle at a much slower rate. C) There would be more light-induced damage to the cells. D) Less oxygen would be produced.
Anabolic steroids used by some athletes are compounds that would be classified as
A. carbohydrates. B. nucleic acids. C. lipids. D. proteins.
Which of the following statements about the cerebrum is NOT true?
A. The cerebrum coordinates the activities of the other parts of the brain. B. It is the largest part of the human brain. C. The right hemisphere is associated with analytical reasoning and the left hemisphere is associated with artistic and musical ability. D. The two cerebral hemispheres are connected by the corpus callosum. E. The gray matter is outermost.