What is the visible part of hair?
Ans: Shaft
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Which of the following examples would most accurately measure the density of the population being studied?
A) counting the number of prairie dog burrows per hectare B) counting the number of times a one-kilometer transect is intersected by tracks of red squirrels after a snowfall C) counting the number of coyote droppings per hectare D) counting the number of moss plants in one-square-meter quadrants E) counting the number of zebras from airplane census observations.
Prions
A. consist of a special nucleocapsid. B. are made of protein only. C. are made of RNA only. D. are made of dsRNA and protein.
A child is born with a hole in his heart between the left and right ventricles. This condition must be immediately corrected with surgery because the hole ________
A) will cause the flow of blood to reverse in the heart B) will allow blood to leak out of the heart and the child could bleed to death C) will cause blood to flow in the reverse direction back into veins instead of the arteries D) allows mixing of both oxygenated and deoxygenated blood, which reduces oxygen delivery to tissues
Miller's reaction chamber contained gases intended to simulate the atmosphere of the ancient Earth. Which gas was
NOT included in this chamber? a. carbon dioxide b. methane c. ammonia d. water vapor e. hydrogen gas