Ever since the antibiotic drug penicillin was discovered in 1928, the incidence of resistant bacteria has steadily increased as a direct result of
(a). biodiversity.
(b). natural selection.
(c). homeostasis.
(d). development.
(e). reproduction.
Answer: natural selection
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In the human retina, _____
A) cone cells can detect color, but rod cells cannot B) cone cells are more sensitive than rod cells to light C) cone cells, but not rod cells, have a visual pigment D) rod cells are most highly concentrated in the center of the retina E) rod cells require higher illumination for stimulation than do cone cells
Although Dolly the cloned sheep and her nucleus donor are clones, they do not contain the same ________ DNA.
Fill in the blank(s) with the appropriate word(s).
If an organism has the appropriate number of chromosomes within their cells, they are referred to as which of the following?
a. polyploid b. trisomy c. aneuploid d. euploid
Out of the countries listed, which has the largest ecological footprint?
a. France b. Mexico c. China d. United States e. India