Population Dynamics

What causes competition to occur in an environment?

• Good conditions make resources plentiful.

• Organisms struggle for a limited resource.

• Members of a population have different roles.

• A population falls below the environment’s carrying capacity.

What is one way that cooperation helps lions to survive?

• They hunt in a group to increase their likelihood of catching prey.

• They all have a tan color that helps them blend into their environment.

• They eat a variety of prey, including zebras, buffaloes, and wildebeest.

• They live in prides of five to ten adult females and their young, and one or two adult males.

Without other changes to a population, which of the following will cause a population to increase in size?

• The birth rate equals the death rate.

• The birth rate is less than the death rate.

• The birth rate is greater than the death rate.

• The birth rate and the death rate both equal 0.

When individuals join a population

• Aliens
• migration
• Immigration
• Emigration

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

• competition and natural disasters
• biomes and ecosystems

A part of the environment that prevents a population from growing to large is a/n______________

• abiotic factor
• biotic factor
• limiting factor

Individuals _____________ when they work together to obtain resources.

• cooperate
• compete

One factor that drives population changes is

• the availability of resources.
• predation.
• both a and b.
• none of the above.

A population is 

• a group of communities that exist in different places
• a group of organisms of one species that lives in the same area at the same time
• a group of people that populate one place at the same time on different planets

When you leave a population

• emigration
• mitigation