wBS #7

How do trophic levels in an ecosystem influence energy flow and nutrient cycling?

• They decrease energy flow and nutrient cycling.

• They have no effect on energy flow and nutrient cycling.

• They influence energy flow, nutrient cycling, and the structure of ecological communities.

• They only affect the energy flow.

What role do keystone species play in ecosystems?

• They have no significant role.

• They destabilize ecosystems.

• They maintain the balance and stability of ecosystems.

• They only affect plant species.

What is carrying capacity?

• The maximum number of species an ecosystem can support.

• The minimum number of species an ecosystem can support.

• The average number of species in an ecosystem.

• The number of species that can migrate to an ecosystem.

What is the function of the cell membrane?

• It provides energy to the cell.

• It controls the movement of substances in and out of the cell.

• It stores genetic information.

• It produces proteins.

What is the role of the cell wall in plant cells?

• It provides energy.

• It provides structural support and protection.

• It conducts photosynthesis.

• It stores water.

What is active transport?

• Movement of molecules without energy.

• Movement of molecules using energy.

• Movement of water only.

• Movement of gases only.

What is passive transport?

• Movement of molecules using energy.

• Movement of molecules without using energy.

• Movement of gases only.

• Movement of solids only.

Which graph shows exponential growth?

• Graph A

• Graph B

• Both Graphs

• Neither Graph

Which graph shows logistic growth?

• Graph A

• Graph B

• Both Graphs

• Neither Graph

What could cause the carrying capacity of a population to increase?

• Decrease in available resources

• Increase in available resources

• Increase in predators

• Decrease in habitat size