Environmental Unit

Which of these would NOT be true of a specialist species?

• They are more likely to go extinct during changes to an ecosystem. 
• They have a very narrow niche.
• They often lose in competition for resources to generalists. 
• They often feed on a very specific diet. 

People in industrialized countries are more likely to eat this in their diet in comparison with people in developing countries.

• Wheat
• Rice
• Beans
• Beef

Of the following, which occupies the lowest trophic level?

• Spider
• Bat
• Rabbit
• Tiger

Introduced or invasive species are often difficult because:

• They contribute to habitat fragmentation
• They do not adapt well to new environments
• They increase biodiversity
• They often lack natural predators

A bird nests in a tree.  The tree does not gain any benefit and is not harmed.  What relationship best describes this:

• commensalism
• parasitism
• mutualism
• mimicry

Individuals with favorable traits survive, reproduce, and pass their traits onto their offspring. This is called:

• Mutation
• Adaptation
• Evolution
• Natural Selection

A population is...

• A group of species in one area
• Multiple species that live in one area
• All of the living and nonliving things in an area
• All biotic and abiotic factors in an ecosystem

A population will most likely stop growing when it reaches its:

• Growth limit
• Exponential limit
• Carrying Capacity
• Metapopulation

Which factor is a density-dependent limiting factor on the population of a species?

• seasonal variation
• natural disasters
• unusual weather
• predation

If the number of births is greater than the number of deaths in a population, what will happen to the growth of the population?

• It will increase.
• It will decrease.
• It will stay the same.
• It will fluctuate.