What percentage of trash in the United States is recycled?
a. 10 percent
b. 25 percent
c. 33 percent
d. 50 percent
e. 75 percent
ANSWER: c
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One of the most extensive animal radiations is that of terrestrial arthropods (includes insects). They excrete uric acid as their form of nitrogenous waste
Why does this allow them to conserve more water than a mammal with extensive kidney tubules for water reabsorption? A. The high solubility of uric acid allows the excretory system to reabsorb water. B. Uric acid levels stay high in the blood maintaining a strong osmotic gradient, which allows water to be reabsorbed. C. After precipitation, uric acid no longer influences osmolarity; water returns to the hypertonic tissues. D. After precipitation, uric acid no longer influences osmolarity; water leaves the hypertonic tissues.
The authors of your textbook described two ways in which the strength of selection can be measured. What are these two ways?
What will be an ideal response?
Assume that a plasmid (circular) is 3200 base pairs in length and has restriction sites at the following locations: 400, 700, 1400, 2600. Give the expected sizes of the restriction fragments following complete digestion
A) 700, 400, 1400, 2600 B) 300, 700, 1000, 1200 C) 400, 800, 1000 (2 of these) D) 300, 700, 2200 E) 400, 1200, 1600
According to the animation, what does oxygen get reduced to at the end of the electron transport chain?
a. ATP b. NADH c. Water d. Electrons e. Protons