U3: 3.5

Question 1

Define density-dependent factors that regulate populations.

Answer 1

Factors that influence population growth depending on population.

Question 2

Examples of density-dependent factors that regulate populations.

Answer 2

Food, competition for habitat, water, light, even disease.

Question 3

Define density-independent factors that regulate populations.

Answer 3

Factors that influence population growth independent of population growth.

Question 4

Examples of density-independent factors that regulate populations.

Answer 4

Natural disasters (flood, hurricane, drought, tornado, fire)

Question 5

Describe and provide an example of uniform population distribution

Answer 5

Spaced out evenly. Ex: territorial animals, germination

Question 6

Describe and provide an example of random population distribution

Answer 6

Random spacing. Ex: trees

Question 7

Describe and provide an example of clumped population distribution

Answer 7

Spaced close together in clumps. Ex: Herd/group animals.

Question 8

Identify the type of growth model populations can exhibit briefly when limiting resources are available in abundance.

Answer 8

The Exponential Growth Model. (Expectations!)

Question 9

Identify the model of growth that populations exhibit in natural ecosystems with limited resources.

Answer 9

The Logistic Growth Model. (Reality!)

Question 10

Explain why populations in natural ecosystems can’t sustain the Exponential Growth Model for long

Answer 10

Resources are limited and finite over time for ALL populations.

Question 11

What curve does The Logistic Growth Model have?

Answer 11

S-curve.

Question 12

What curve does The Exponential Growth Model have?

Answer 12

J-curve.

Question 13

Formula for calculation population size

Answer 13

Population size= (births+immigrations) - (deaths+emigrations)