Driving along a highway, you start noticing plants with tiny blue flowers. Several miles later, these flowers are very abundant. Then even further, the flowers become less abundant, until finally, you do not see them at all
The regions with just a few of these plants represented the plant's A) optimal range.
B) zones of stress.
C) resource reservoirs.
D) optimal habitats.
B
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Which of the following is true about security?
A. While environmental security has been given considerable attention, there is a need to devote more attention to economic security instead. B. Environmental security, military security, and economic security are completely separate and not related. C. While environmental security has been given less attention, it should be considered along with economic security, military security, and their interactions. D. Ecologists and economists do not think that environmental security should be considered in diplomatic activities even though it is important within a country. E. Environmental security can be addressed separately from other forms of security and can be handled entirely by volunteers and nongovernmental organizations.
A population of catfish in a muddy pond reaches its maximum size as the food supplies start to run low. Without any new sources of food, the catfish population remains steady. This population represents
A) density-dependent logistic growth. B) density-independent logistic growth. C) density-dependent exponential growth. D) density-independent exponential growth.
Which scenario would cause an air mass to stop rising at the lowest level in the troposphere?
A. When the normal lapse rate and the adiabatic lapse rate are parallel. B. When the normal lapse rate and the adiabatic lapse rate intersect. C. When the normal lapse rate and the adiabatic lapse rate diverge.
A situation in which a released chemical has contacted people and the environment is described as _____.
a. Absorption b. residue c. Contamination d. Exposure