Which environmental factor is most significant for flowering?
A) Light intensity
B) Temperature
C) Water availability
D) Day length
E) Nitrogen availability
D
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Answer the following statements true (T) or false (F)
1. The island biogeography model of Robert MacArthur and E.O. Wilson attempts to predict an equilibrium number of species on an island based on the immigration of new species and the extinction of resident species. 2. Tree species richness in the United States is highest in the southeast. 3. In the Shannon diversity index, communities with more species evenness will tend to have a higher H. 4. Joseph Connell proposed that at low rates of disturbance, a community will become dominated by K-selected species.
An ELISA test to detect antibodies to the Rubella virus would include/use all of the following EXCEPT
A. the patient serum specimen. B. microtiter wells coated with rubella antigen. C. enzyme-labeled rabbit antihuman IgG antibodies. D. a chromogenic enzyme substrate. E. There are no exceptions here. Each of these items would be used.
The _____ produce flagellated sperm
a. mosses d. monocots b. ferns e. mosses and ferns c. conifers f. mosses, ferns, and conifers
Apoptosis is defined as:
A) hypoxic cell death. B) normal cell death. C) pathologic cell death. D) premature cell death.