Based on the results of the experiment, which of the following types of molecules did the bacteriophages most likely inject into the bacteria cells?
(A) Simple carbohydrate
(B) Amino acid
(C) DNA
(D) Polypeptide
Answer: (C) DNA
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In genetic analyses, researchers know that
linkage of genes will introduce exceptions to the principle of
a. dominance. b. segregation. c. recessiveness. d. independent assortment. e. chromosome inheritance
Gas exchange in terrestrial insects is accomplished through:A
the use of gills. B. the use of book lungs. C. the use of tracheae. D. diffusion across the epidermal layer. E. a closed circulatory system.
Why do women experience the symptoms of osteoporosis more acutely than men?
A) Women have less bone mass and produce less estrogen later in life; these factors accelerate calcium loss. B) Women have less muscle mass and don't exercise as much. C) Men don't produce estrogen, so they don't rely on it as much as women do. D) Men take in more calcium in their diet, so they can't get osteoporosis.
What do the cells that form the outer sphere of the mature Graafian follicle become once luteinizing hormone transforms the cells?
A) corpus luteum B) follicle C) first polar body D) ovum