factors + formulas

Question 1

What does density-dependent mean?

Answer 1

a factor that is dependent on the density of a population.

Question 2

What does density-independent mean?

Answer 2

factors not relating to the density of a population.

Question 3

Biotic factors like intraspecific competition, interspecific predation, disease and parasites, and social behavior are examples of what?

Answer 3

density-dependent factors

Question 4

Abiotic factors like sunlight, water, and natural disasters are examples of what?

Answer 4

density-independent factors

Question 5

What equation represents a population that is growing?

Answer 5

B + I > D + E
where B- births, I-immigration, D-deaths, E-emigration

Question 6

B + I = D + E is an equation representing what?

Answer 6

stable growth

Question 7

A shrinking population would have an equation that looks like…?

Answer 7

B + I < D + E

Question 8

How do you calculate r?

Answer 8

(births - deaths) / N0

Question 9

True or False;
density-independent factors are not related to the density of a population

Answer 9

true

Question 10

True or False;
Disease and parasites are abiotic factors

Answer 10

False; they are biotic and density-dependent.

Question 11

True or False;
The formula for a growing population is D + I > B + E

Answer 11

False; It is B + I > D + E
or (births + immigration) > (deaths + emigration)