Which of the following describe density-dependent factors? They act to regulate
ID: 178000 • Letter: W
Question
Which of the following describe density-dependent factors?
They act to regulate population growth.
They are especially important in K-selected populations.
They can affect growth rates but not population size.
They can affect birth rates or death rates.
They do not involve biological interactions.
One example would be intraspecific competition for resources.
Investigate the cost of reproduction by completing each sentence.
Reproductive trade-offs exist because resources are ____________ .
A bird that lays many eggs is likely to lay ____________ eggs than a bird that lays few eggs.
more
smaller
the same numberof
cost
growth
unlimited
fewer
limited
mortality
larger
reward
smaller
migration
Explanation / Answer
Density-dependent factors: Any factor limiting the size of a population whose effect is dependent on the number of individuals in the population. For example, disease will have a greater effect in limiting the growth of a large population, since overcrowding facilitates its spread, (encyclopedia, science).
They act to regulate population growth (true)
They are especially important in K-selected populations (true) as k-selected populations are populations were selection occurring when a population is at or near the carrying capacity of the environment, which is usually stable: tends to favor individuals that successfully compete for resources and produce few, slowly developing young, and results in a stable population of long-lived individuals.
Affect birth rates or death rates (true)
One example would be intraspecific competition for resources. (true)
Investigate the cost of reproduction by completing each sentence.
Reproductive trade-offs exist because resources are fewer.
A bird that lays many eggs is likely to smaller eggs than a bird that lays few eggs
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