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November 22, 2020

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Population density is defined as

a.

an approximation of a number, based on reasonable assumptions.

b.

the number of individuals of a population in a specific area.

c.

the number of individuals moving into a population.

d.

the smallest level of ecological organization.

Please select the best answer from the choices provided

An early winter frost preventing further growth in a tomato garden is an example of

a.

carrying capacity.

b.

a limiting factor.

c.

a biotic factor.

d.

indirect observation.

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Observing animal tracks is an example of directobservation, which is used to estimate population size.

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The carrying capacity is the smallest number of individuals in a population that can live in one area.

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Why is it important to study whole ecosystems?

a.

It is more interesting

c.

Individual pieces are independent

b.

All parts of an ecosystem are interdependent

d.

Only the primary producers are important

Please select the best answer from the choices provided

If you count 20 beetles in a garden measuring 5 square meters, the population density of the beetles is

a.

100 beetles per square meter.

b.

20 beetles per square meter.

c.

5 beetles per square meter.

d.

4 beetles per square meter.

Please select the best answer from the choices provided

The samplingmethod of estimating involves multiplying the number of organisms in a small area to find the number in a larger area.

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Population size generally increases if the birth rate is greater than the death rate.

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A group of zebras breaking off from a herd decreases the size of the herd population through immigration.

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When determining population size using direct observation, every individual in a population is counted.

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