Which is NOT a possible outcome from infection by an animal virus?
a. avirulent infection
b. persistent infection
c. latent infection
d. transformation
Answer: A
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Answer the following statements true (T) or false (F)
1. All tissues are composed of cells. 2. The capacity to maintain a fairly constant body temperature is a homeostatic process. 3. A community is composed of different populations of animals and plants. 4. A defining characteristic that distinguishes prokaryotic and eukaryotic organisms is the lack of cell structure in one versus the other. 5. The modification of a limb that was used for walking in a pre-existing ancestor to one that is used as a wing for a species today is called proteomics.
Most leaf cells are no more than ____ from a xylem vein
a. one inch b. one centimeter c. half a millimeter d. 50 micrometers e. two inches
Populations ____
a. are only limited by one factor at a time b. increase arithmetically c. may increase indefinitely d. are limited by the carrying capacity e. overcome limiting factors by increasing their biotic potential
Which of the following is NOT an example of symbiosis?
A) bacteria in the human colon B) tapeworm in the human intestine C) tuberculosis in the human lung D) protozoa in termites E) microbes passing across the placenta to the fetus