Resident flora of the intestines include
A. Bacteroides.
B. Haemophilus.
C. Staphylococcus.
D. Streptococcus.
E. All of these choices are correct.
Answer: A
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Viruses are not considered to be alive, yet they share this ability with living cells:
a. They can metabolize food b. They can evolve c. They can reproduce on their own d. They can produce cell membranes e. They can synthesize proteins
To stand upright for a long period of time without moving, the muscles of the back must produce which type of
contraction? a. isotonic b. isometric c. isocentric d. eccentric e. concentric
The cell cycle of a typical somatic cell consists of the ____ and M phases
a. interphase b. meiosis I c. crossing-over d. meiosis II e. mitosis
Sometimes hybrids are capable of reproducing; however, their offspring are incapable of producing future offspring. This is an example of _______ acting as a postzygotic isolating mechanism.
What will be an ideal response?