Which component of red blood cells is responsible for oxygen transport?
a. Proline
b. The cell membrane
c. Valine
d. Hemoglobin
e. ?The ribosomes
d
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The greenhouse effect is a natural phenomenon that keeps the earth's surface warm. Without greenhouse gases-water vapor, carbon dioxide, methane, nitrous oxide, halocarbons, and ozone-life as we know it wouldn't exist. The current problem is that
A. global warming actually benefits 90 percent of the world's population, so it is difficult to mobilize the will to address the anthropogenic causes of climate change. B. the atmospheric concentration of greenhouse gases has reached its highest level in 400,000 years and will continue to rise, as will global temperatures, without actions to slow it down. C. it is difficult to distinguish between climate change and global warming. D. scientists cannot agree on a general model of how the greenhouse effect went from being a positive to a negative and a life-threatening force. E. most scientists dispute the anthropogenic reasoning for high concentrations of greenhouse gases.
Sister chromatids are when two copies of the original chromosome are joined in the shape of a(n) __________
Fill in the blank(s) with correct word
Until recently, the prevailing view was that humans were __________.
A) in North America more than 50,000 years ago B) not present south of Alaska until after 11,500 years ago C) driven south by the expansion of the ice sheets D) originally in North America, and then moved into Asia
Using Excel, Tough Scrubbers estimates the quarterly demand for their kitchen sponges to be Qd = 5,600 - (25 × P). If the actual demand for their kitchen sponges is 5,563 when a price of $3 per sponge is charge, what is the estimated residual?
A) 38 B) 0 C) 12 D) 25