B10 Ecosystems

Question 1

population is

Answer 1

A group of individuals of one species

Question 2

A habitat

Answer 2

place where this community of plants and animals lives

Question 3

A community is

Answer 3

all of the populations of different species interacting with each other in an ecosystem.

Question 4

An ecosystem is

Answer 4

a unit containing the community of organisms and their environment, interacting together.

Question 5

Intraspecific competition

Answer 5

competition between organisms of the same species for resources such as food, territory, a mate or a nesting site. These factors would have a negative effect on population size if they were in short supply.

Question 6

Interspecific competition

Answer 6

is competition between organisms of different species for resources such as food. In this case, one species is often successful in forcing the other species out of the community.

Question 7

Interspecific competition

Answer 7

is competition between organisms of different species for resources such as food. In this case, one species is often successful in forcing the other species out of the community.

Question 8

Factors that cause the size of the population to change include:

Answer 8

food supply
predation
disease.

Question 9

Mutualism

Answer 9

This is a close relationship between two organisms of different species where both organisms benefit.

Question 10

Parasitism

Answer 10

A parasite is an organism that lives on or in the body of another organism, the host. The parasite gains from the relationship while the host is harmed.

Question 11

photosynthetic organisms are…

Answer 11

primary producers of food in an ecosystem, and therefore biomass