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
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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.
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.
Which muscle contraction is involuntary?
A. cardiac only B. smooth only C. skeletal only D. cardiac and smooth E. cardiac, smooth, and skeletal
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?