Life Science Grade 11(Population Ecology)

Question 1

What is population ecology?

Answer 1

The study of how populations interact with their environment.

Question 2

True or False: Population ecology focuses on the study of individual organisms within a population.

Answer 2

False

Question 3

What is a population?

Answer 3

A group of organisms of the same species living in the same area.

Question 4

What factors can affect population size?

Answer 4

Birth rate, death rate, immigration, and emigration.

Question 5

Define carrying capacity.

Answer 5

The maximum number of individuals of a species that an environment can support.

Question 6

What is population density?

Answer 6

The number of individuals of a species per unit area.

Question 7

What is a limiting factor?

Answer 7

A factor that limits the growth of a population.

Question 8

What is exponential growth?

Answer 8

Population growth at a constant rate of increase per unit of time.

Question 9

What is logistic growth?

Answer 9

Population growth that levels off as resources become limited.

Question 10

What is an example of a density-independent factor?

Answer 10

Natural disasters.

Question 11

What is an example of a density-dependent factor?

Answer 11

Competition for resources.

Question 12

What is a pioneer species?

Answer 12

The first species to colonize a newly disturbed area.

Question 13

What is a climax community?

Answer 13

A stable, mature community that undergoes little or no change.

Question 14

What is the difference between a r-strategist and a K-strategist?

Answer 14

R-strategists reproduce quickly and have many offspring, while K-strategists reproduce slowly and have few offspring.

Question 15

What is a biotic factor?

Answer 15

A living factor that influences an organism.

Question 16

What is an abiotic factor?

Answer 16

A non-living factor that influences an organism.

Question 17

What is the difference between immigration and emigration?

Answer 17

Immigration is the movement of individuals into a population, while emigration is the movement of individuals out of a population.

Question 18

What is the difference between a population and a community?

Answer 18

A population consists of individuals of the same species, while a community consists of populations of different species living together.

Question 19

What is a keystone species?

Answer 19

A species that has a disproportionately large effect on its environment relative to its abundance.

Question 20

What is the difference between intraspecific competition and interspecific competition?

Answer 20

Intraspecific competition is competition between individuals of the same species, while interspecific competition is competition between individuals of different species.

Question 21

What is the importance of studying population ecology?

Answer 21

To understand how populations change over time and how they interact with their environment.

Question 22

What is a population pyramid?

Answer 22

A graphical illustration that shows the distribution of various age groups in a population.

Question 23

What is the demographic transition model?

Answer 23

A model that describes the transition from high birth and death rates to low birth and death rates in a population.

Question 24

What is the difference between density-dependent and density-independent factors?

Answer 24

Density-dependent factors affect populations based on their density, while density-independent factors affect populations regardless of their density.