Substances that are naturally produced by certain microorganisms that can inhibit or destroy other microorganisms are called
A) Broad-spectrum drugs
B) Semisynthetic drugs
C) Narrow-spectrum drugs
D) Antibiotics
E) Synthetic drugs
D) Antibiotics
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Why are we concerned at all with monitoring emerging/reemerging diseases?
A. These represent growing threats to human health that will require new scientific research and resources to effectively combat. B. Because globalization (greater trade and travel between countries) leads to more chances for spread of illnesses into new areas and populations. Monitoring these illnesses will help us to protect people. C. Because the speed of travel has increased greatly. With increased speed of travel, it is far more likely that a serious pathogenic threat from one area of the world can spread rapidly across the globe in a very fast manner. We need to monitor the occurrence of these illnesses to try to protect populations. D. All of the above.
Early life most likely evolved where ____ was plentiful
a. lightning b. solar energy c. hydrothermal vents d. geochemical activity e. radioactive decay
________ is a very common second messenger in the action of water-soluble hormones on the target cells
Fill in the blank(s) with correct word
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.