Answer:
The options are given below:
A) competitively exclude other predators.
B) prey on the community's dominant species.
C) allow immigration of other predators.
D) reduce the number of disruptions in the community.
E) prey only on the least abundant species in the community.
the correct option is B
Explanation:
Keystone species refers to a predator which prevents a particular herbivorous species from wiping out the dominant plant species. If the number of prey are low, the keystone predators can be less abundant and still be effective. Keystone species have a disproportionately large effect on its environment relative to its abundance.
Therefore, by preying on a community's dominant species, keystone predators help to maintain the species diversity in the community, because they ensure that the dominant predators do not totally wipe out the various organisms present in the ecosystem.
Answer:
b
Explanation:
yes they should encourage everyone and the share the information with everyone so that interested and qualifying candidates can get a chance to apply
Answer:
Margin of safety= $60,000
Explanation:
Giving the following information:
A firm's forecasted sales are $250,000 and its break-even sales are $190,000.
The margin of safety is the excess of sales from the break-even point. To calculate the margin of safety, we need to use the following formula:
Margin of safety= (current sales level - break-even point)
Margin of safety= 250,000 - 190,000= 60,000
Answer:
The correct answer is the letter b. This is a common occurrence. The policymaker usually disregards an economist's advice because they do not believe it is the most efficient policy.
Explanation:
It is common for policymakers to disregard the advice of an economist. This is because in addition to their often finding that the policies suggested by economists are not the most efficient, they observe the political return of such action, ie not just efficiency, but the extent to which this policy will bring political benefits. Thus, as in this case, the policy is not implemented because it is not popular with voters.
If emma's mother arrives in 70 minutes, it means that she will be home at 5:22 p.m. Then, as the gymnastics lessons begin at 6:00 p.m. means that Emma has 38 minutes between the time that her mom gets home from work and beginning of gymnastics lessons
