Estimating Population Sizes Density

When an area is crowded with many organisms per km², it is said to be...

• Isolated

• Densely populated

• Sparsely populated

• Minimally populated

Which of the following statements best defines population?

• The total number of organisms living in an area

• Where organisms are living and how spread out or close together they are

• The average number of organisms living in a certain area

Which of the following statements best defines population density?

• The total number of organisms living in an area

• Where organisms are living and how spread out or close together they are

• The average number of organisms living in a certain area

Which of the following statements best defines population distribution?

• The total number of people living in an area

• Where people are living and how spread out or close together they are

• The average number of people living in a certain area

What is the average number of individuals in a population per unit of area or volume?

• population growth

• population density

• population size

The population size is the number of individuals in a population.

• True

• False

The characteristics of a species or its environment may affect the pattern of spacing of individuals in a population.

• True

• False

Tags

NGSS.HS-LS2-1

NGSS.HS-LS2-2

_________ describes how individuals are distributed, or spread, throughout their habitat.

• Population density

• Population distribution

Ecologists use quadrat sampling to do what?

• estimate the climate of a particular biome

• estimate the population size of a species within a certain area

• observe which trophic level a certain population belongs to

• estimate the likelihood of an organism to survive

If 50 crabs were captured and marked and then released and then a few days later 25 were caught and of those 5 were marked. What would the estimate of the population be?

• 500

• 250

• 75

• 200

Tags

NGSS.HS-LS2-2