The greatest number of bacteria forming the normal flora are found:

A. On the skin
B. In the mouth
C. in the large intestine
D. in the vagina
E. in the nose


Answer: C. in the large intestine

Biology & Microbiology

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The diagram below represents a protein electrophoresis gel with samples from six individuals tested for variants (alleles A and B) of a single protein. What are the genotype frequencies?

A. 33.3% A, 66.6% B B. 75% A, 25% B C. 25% B, 75% A D. 66.6% A, 33.3% B E. Can't determine the frequency from this information.

Biology & Microbiology

Which statement about sex chromosomes is correct?

a. The Y chromosome carries a greater number of genes for nonsexual traits than does the X. b. X and Y are different in size but carry nearly equal numbers of genes. c. The X chromosome carries more genes for nonsexual traits than does the Y. d. The X chromosome carries only gender-related genes. e. The X chromosome carries the SRY gene.

Biology & Microbiology

Which muscle contraction is involuntary?

A. cardiac only B. smooth only C. skeletal only D. cardiac and smooth E. cardiac, smooth, and skeletal

Biology & Microbiology

What will always have an equal percentage of A and G, and an equal percentage of C and T?

What will be an ideal response?

Biology & Microbiology