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In a cohort study that found an association between alcohol consumption and bladder cancer, 20,000 middle-aged men were asked about their drinking habits and then tracked for five years to watch for the development of cancer. Researchers asked the men about their diet and exercise habits, but not about smoking. What is the most likely source of error in this study?
A. Reporting bias
B. The placebo effect
C. Selection bias
D. Confounding variables
why materials move from high to low concentration. Isn't this just a waste of energy.
This solution defines the cell interaction and signaling defects in.
Within an essay response, discuss the next concepts: an antioxidant's function, free radicals and their effect on the human body, sources of vitamin C, optimal delivery system for vitamin C, and precautions for use of vitamin C.
The small intestine is specialized for absorption by the huge number of villi that line the intestinal wall. Villi have cells that generate intestinal enzymes which complete the digestion of peptides and sugars.
What is the number of progeny expected in 1000
On the Pacific island of Guam, large herbivorous bats called "flying foxes" commonly feed on cycad seeds, a potent source of neurotoxins. The flying foxes do not visit male cones. As a result, what should be true.
The same domains and/or motifs are found in many proteins. In fact, a protein's tertiary structure is more conserved (stays the same or same over many generations) than its amino acid structure.
Acetylcholine acts at the G-protein-linked receptor on heart muscle to make the heart beat more slowly by the effect of the G protein on a K+ channel. Which one or more of next would enhance this effect of acetylcholine.
In order to separate the RNA you majorly utilize a protein denaturant solution of the guanidinum salts. These chaotropic solutions denature by disrupting the H- bonding.
If Mendel chose corn instead of pea plants to conduct his first experiments, what is the maximum number of traits he could have documented in breeding experiments in order to establish his law of segregation (each trait is determined by two factors) ..
A friend of yours is wearing a bright red shirt. In terms of properties of light and pigments, describe why the shirt appears red to you.
A fish on the outside of a school swims inward, leaving other fish on the edge. These new "edge" fish then move inward and the cycle repeats.
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