Heart valve replacement in humans using a pig valve is an example of a(n)
A) autograft.
B) isograft.
C) allograft.
D) xenograft.
D) xenograft.
Biology & Microbiology
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Methylene blue in EMB agar is selective for
A) gram-positives. B) gram-negatives. C) viral plaques. D) both gram-positives and gram-negatives.
Biology & Microbiology
Most chytrids are ____
a. saprobes in soil b. parasites of plants c. symbiotic partners of cattle d. parasites of animals e. aquatic
Biology & Microbiology
Tendons and ligaments are composed of ________.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
One of the most significant steps in the evolution of true cells from macromolecular assemblages was the evolutionof:a
electronegativity. b. covalent bonding. c. hydrogen bonding. d. valence electrons. e. molecular reproduction
Biology & Microbiology