Match the following items to the correct phrase.
_______1. Viruses that infect bacteria and cause the lytic cycle to occur.
_______2. Term meaning complete viral particles.
_______3. Are known to cause some plant diseases, but no animal diseases.
_______4. Infectious protein molecules.
_______5. Infectious molecules of RNA.
_______6. Cause diseases such as Creutzfeldt-Jacob disease, “mad cow disease,” and “scrapie.”
a. viroids
b. virions
c. prions
d. temperate phages
e. virulent phages
1. e. virulent phages
2. b. virions
3. a. viroids
4. c. prions
5. a. viroids
6. c. prions
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Put the following steps in the procedure for producing a karyotype in the correct order.
I. Cells are visualized under the microscope. II. Cells are stimulated to divide. III. Homologues are organized into sets by matching size and banding patterns. IV. The cells are exposed to a hypotonic solution. V. Cells are stained and placed on a microscope slide. A. I, II, IV, V, III B. II, IV, V, I, III C. IV, II, V, I, III D. IV, V, II, I, III E. II, IV, I, V, III
A continuous distribution of characters such as height, body weight, or skin color is usually the result of
1.epistasis. 2.incomplete dominance. 3.polygenic inheritance. 4.pleiotropy. 5.codominance.
The right atrium receives what kind of blood from the rest of the body in a frog?
What will be an ideal response?
Essay on the Principle of Population, written by Thomas Malthus in 1798, influenced Darwin's thoughts as he struggled to understand what mechanisms could be at work to produce evolution. Malthus proposed that populations of animals and plants, including humans,
A. increased arithmetically in numbers while the nutrients available only increased geometrically. B. evolved from islands to mainland, thus explaining why unrelated species on the mainland are found in the same location. C. increased geometrically in numbers while the nutrients available only increased arithmetically. D. decreased arithmetically in numbers while the nutrients available increased geometrically. E. evolved from mainland to islands, thus explaining why the island flora and fauna resembled the mainland species so closely.