2nd Hour - Lessons 3 & 4 practice

Front

What are two ways in which the environment can influence population size?

Back

Competition and natural disasters.

Front

What is the term for when individuals join a population?

Back

Immigration.

Front

What is mutualism?

Back

Both organisms benefit.

Front

True or False: Camouflage can help both predators and prey.

Back

True.

Front

Which is an example of commensalism?

Back

A bird finds an existing hole in a tree and builds a nest in it.

Front

What is competition in an ecosystem?

Back

The struggle between organisms for the same resources.

Front

Define migration.

Back

The movement of individuals from one place to another, often seasonally.

Front

What is emigration?

Back

The act of leaving one's resident population to settle elsewhere.

Front

What is the difference between mutualism and parasitism?

Back

In mutualism, both organisms benefit; in parasitism, one benefits while the other is harmed.

Front

What role do natural disasters play in population dynamics?

Back

They can drastically reduce population size and alter ecosystems.