Genetic mutations in asexually reproducing organisms lead to more evolutionary change than do genetic mutations in sexually reproducing ones because _____
A) asexually reproducing organisms, but not sexually reproducing organisms, pass all mutations on to their offspring
B) sexually reproducing organisms can produce more offspring in a given time than can asexually reproducing organisms
C) more genetic variation is present in organisms that reproduce asexually than is present in those that reproduce sexually
D) asexually reproducing organisms have more dominant genes than organisms that reproduce sexually
A
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What is present in arterioles that is NOT present in capillaries?
A) white blood cells and platelets B) carbon dioxide C) a lining of endothelial cells D) circular smooth muscle cells
The pathogen can indirectly damage its host by _____
a. the secretion of toxins b. inducing excessive immune responses c. the secretion of exoenzymes
Rank the following in order from most general to most specific:
1. gametic isolation 2. reproductive isolating mechanism 3. sperm-egg incompatibility in sea urchins 4. prezygotic isolating mechanism A) 2, 3, 1, 4 B) 2, 4, 1, 3 C) 4, 1, 2, 3 D) 4, 2, 1, 3
Both ionizing and nonionizing radiation tend to effect what?
A) DNA B) Cell membrane C) Cell wall D) Proteins