Complex microbial communities that grow tightly adhered to surfaces are called ________.
Fill in the blank(s) with the appropriate word(s).
biofilms
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Which of the following statements is consistent with the principle of competitive exclusion?
A) Bird species generally do not compete for nesting sites. B) The random distribution of one competing species will have a positive impact on the population growth of the other competing species. C) Two species with the same fundamental niche will exclude other competing species. D) Even a slight reproductive advantage will eventually lead to the elimination of the less well adapted of two competing species. E) Natural selection tends to increase competition between related species.
All cells have a plasma membrane, cytoplasm, and ribosomes.
A. True B. False
The knocking out, replacement, or addition of a gene in a genome is called____
a. DNA manipulation b. gene manipulation c. gene targeting
d. DNA cloning e. transgenic modification
The effect of inositol triphosphate is usually transient because __________.
a) it is slowly activated enzymatically b) it is rapidly inactivated enzymatically c) it is so big d) it is so small e) it is so stable