Unit 3 Populations

All the organisms of the same species that live in the same area are called a ______.

• Group
• Population
• Herd
• Cluster

A factor or factors that can affect species distribution is/are ____.

• Predation
• Disease
• Competition
• All of the above

The population size is the number of individuals in a population.

• True
• False

Populations of different species in a particular area make up a community. True or False?

• True
• False

If birth rate plus immigration exceeds death rate plus emigration, a population _______.

• grows
• declines
• stays the same
• none of the above

Emigration is the movement of individuals ______ a population.

• into
• out of

A friend of yours believes that predators are extremely detrimental (bad) for ecosystems and that the ecosystem would be better off without them. You should

• disagree
• agree
• tell on them
• unfriend them indefinitely

Predation is the relationship in which members of one species consume members of another species.

• True
• False

All biomes have populations of interacting species.

• True 
• False

The lion is the natural predator of the zebra. If the zebra population drops, the lion population will most likely

• drop
• thrive
• be unaffected
• decrease, then increase exponentially