Population + Communities

The biosphere includes all the land of the continents and islands, all of the earth’s oceans, lakes, and streams, as well as the ice caps at the North Pole and the South Pole.

A group of organisms that lives in an area at one time, as well as the climate, soil, water, and other nonliving parts of the environment is called what?

The study of all ecosystems on Earth is ecology.

All the organisms of the same species that live in the same area at the same time is called what?

All the populations of different species that live together in the same area at the same time is called what?

A group of organisms that have similar traits and are able to produce fertile offspring is called what?

Competition is the demand for resources, such as food, water, and shelter, in short supply in a community.

When there are not enough resources available to survive, there is less competition in a community.

A limiting factor is anything that restricts the size of a population.

Available sunlight is not part of a limiting factor for most organisms.

Temperature is not part of a limiting factor for some organisms.

Population density is the size of a population compared to the amount of space available.

The place within an ecosystem where an organism lives is its what?

A _________ is what a species does in its habitat to survive.

Different species have different niches in the same environment.

Organisms that get energy from the environment, such as sunlight, and make their own food are called what?

Organisms that get energy by eating other organisms. Herbivores get their energy by eating plants are called what?

Carnivores get their energy by eating producer.

Omnivores, such as most humans, get their energy by eating producers and consumers.

Detritivores get their energy by eating dead organisms or parts of dead organisms.

A food chain is a way of showing how energy moves through a community.

A close relationship between two or more organisms of different species that live in direct contact is called what?

A symbiotic relationship in which both partners benefit is called what?

A symbiotic relationship that benefits one species but does not harm or benefit the other is called what?

A symbiotic relationship that benefits one species and harms the other is called what?