Characteristics between the branch points of a cladogram that are shared by all organisms above the branch point and are not present in any below it are called
A. ancestral characters.
B. novel characters.
C. homoplastic characters.
D. derived characters.
E. homologous characters.
Answer: D
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Alternate forms of the same gene are called
A. homologues. B. genotypes. C. cofactors. D. alleles.
The active ingredient in the popular drug Ecstasy is related to
a. heroin. b. cocaine. c. codeine. d. amphetamine. e. serotonin.
Penicillin is toxic to certain dividing bacterial cells because it prevents cell wall formation, causing the
cells to burst. This indicates that the bacteria live in: a. a hypotonic medium. b. a hypertonic medium. c. an isotonic medium. d. a medium with a higher osmotic pressure than the cell. e. both a hypertonic medium and a medium with a higher osmotic pressure than the ce
When cloning Dolly, in order to encourage the plasma membranes of the two cells to become leaky so that the contents of the mammary cell passed into the egg cell, researchers applied
A. several methyl groups. B. an electrical shock. C. adeno-associated viruses. D. DOPA.