Which of the following by-products of metabolism is the most toxic?
A) carbon monoxide
B) ammonia
C) urea
D) lactic acid
Answer: B
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The 2+ in Cu2+ tells us that this atom ________.
A. has two more neutrons than protons B. has two more electrons than protons C. has two more protons than electrons D. has two more electrons than neutrons
The evolution of similar forms in different lineages when exposed to the same selective pressures is
A. called divergence. B. called convergence. C. referred to as successive homologies. D. referred to as descent. E. also known as natural selection.
Scientists have known for centuries that we "speak" with the left hemisphere of the brain. You perform an experiment in which your subject was presented with an apple only to the left visual field
When asked to identify what he saw, the subject denied seeing anything. However, when asked to point to the correct object, he was able to see and identify the apple. Which reason would explain this deficit? A) The subject has a brain lesion in the frontal lobes. B) The subject suffered head trauma to the back of his head. C) The subject has a tumor in the left parietal lobe. D) The subject had his corpus callosum severed to control epileptic seizures.
The fermentation product known as silage is
A) a step in the production of brandy. B) a means of food preservation. C) a means of making plant materials more appealing to livestock. D) a meat product. E) made from milk.