EnviSci101

What does a food web represent?

• All connections of energy flow throughout all organisms in a habitat.

• The specific ways that mutualism is carried out.

• A single pathway or energy flow between organisms.

• How carnivores get their food.

All organisms, that are not plants, get their energy from the sun ______________________.

• directly

• immediately

• indirectly

• slowly

What is an example of a density-independent (Abiotic) limiting factor?

• food

• parasites

• disease

• pollution

Parasites, disease, predators, are examples of what type of limiting factors?

• density dependent

• density independent

• survivorship

• type 1 curve

The number of people in a defined area such as a square kilometer.

• population density

• birth rate

• death rate

• population

Why would an area be sparsely populated?

• lack of natural resources

• land is covered with ice

• land cannot be developed

• all of the choices

An example of a density dependent limiting factor is...

• an avalanche.

• the amount of available food.

• a sudden flood

• a decrease in water due to drought.

Many bird species are territorial, meaning that each individual bird maintains a defined territory of the same size, as seen in the image below. In territorial bird species, what kind of dispersion pattern would you expect?

• uniform

• random

• clumped

• dense

Which of the following is an example of a living organism interacting with an abiotic factor?

• Cows eating grass.

• Sun warming and melting ice into liquid water.

• Rocks adding nutrients to the soil.

• Plants absorb water from the ground

Researchers have found that a local squirrel population fluctuates from year to year, increasing one year and decreasing the next. Which of the following factors would cause the squirrel population to grow?

• the birth rate is equal to the death rate

• emigration is greater than immigration

• the death rate is higher than the birth rate

• the birth rate is greater than the death rate