CH 9: Populations and Communities

The variable that is changed in an experiment

The picture represents a ____________ of dogs.

The flea lays its eggs on the dog. When the larvae hatch, they feed off the host's blood.

A organism's habitat includes ___________.

A strong community needs to have __________________.

The bird is a(n)

The largest population an environment can support is called its ________.

The nest in a tree is an example of ___________.

Limiting factors for a population include ____________.

This is an example of __________________.

Who might feed on this dead bird?

What type of relationship includes mutualism and parasitism?

Both species benefit in this type of symbiosis.

What can cause a population to increase?

This is an example of ______________.

The giraffe is a ____________.

In this food web, the lion is a _____________.

Why is this an example of parasitism?

A group of the same kind of organisms in an area

This is an example of a _____________ of zebras.

What a species does in its habitat is called its ________.

The place in which an organism lives is called its _____________.

The bird eats the bacteria off the alligator's teeth. The alligator gets clean teeth! What type of relationship is this?

How can the existence of predators affect a population size?

How does overpopulation of one species affect the other species in the area?

The bird is a __________ and the worm is _________.

Green plants use the _________ to make food through ____________.

A person eating this cheeseburger would be considered a ___________.

Overpopulation might cause an animal population to __________.

The number of robins that hatch in a year is the population's _______.

Grass gets its energy from _________________.

All of the organisms and the physical environment with which they interact

A population will grow when _______________.

Which symbiotic relationship is shown here?

Which of the following shows competition between organisms?

What is the term for all the species living in the same area at the same time?

All the biotic and abiotic factors together make up a(n)

Which of the following are limiting factors?

The variable that is measured in an experiment

How is an ecosystem different than a community?

The butterflies make up a(n)

The gazelle in this food web is a ___________.

What does extinct mean?

Which of the following would be a reason for a population to emigrate (leave the area)?

A community consists of _________________.

Why is this an example of mutualism?

Why is this an example of commensalism?

What is the demand for resources in short supply in a community?