Ecology AP Bio

In the ocean nitrogen is often the limiting nutrient. What does this term mean?

• An unlimited amount of nitrogen is in the ecosystem

• Nitrogen is scarce or cycles very slowly through the ecosystem.

• The presence of nitrogen limits the availability of other nutrients

• Nitrogen is overabundant or cycles very quickly through the ecosystem

Tags

NGSS.MS-LS2-1

Ecologists study different levels of organization within the biosphere. Identify which level corresponds to a group of individuals that belong to the same species and live in the same area.

• Community

• Biome

• Ecosystem

• Population

In addition to energy, organisms need matter to survive. Which of the following is true about matter in the biosphere?

• The total amount of matter decreases overtime

• The total amount of matter increases overtime

• Biogeochemical cycles transform and reuse molecules

• Matter flows through ecosystems in one direction

Tags

NGSS.MS-LS2-3

Each step in a food chain is called a trophic level. What percentage of energy available at one trophic level is transferred to organisms at the next level?

• about 2 percent

• about 10 percent

• about 25 percent

• about 50 percent

Tags

NGSS.MS-LS2-3

What is true about the pyramid of numbers?

• There are more producers than first-level consumers

• First-level consumers make up the greatest number of individuals

• There are more third-level consumers than second-level consumers

• There are more second-level consumers than first-level consumers

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

Series of steps in which organisms transfer energy by eating and being eaten

• foodweb

• consumer

• food chain

• omnivore

Tags

NGSS.MS-LS2-3

All the organisms in a particular location, including their nonliving environment

• ecosystem

• carnivore

• niche

• population

Tags

NGSS.MS-LS2-3

What may happen if the snowshoe hare was removed from the food web pictured?

• The insects in the habitat would increase.

• The shrew population would decrease due to being the only hawk food source.

• The willow tree population would decrease.

• Foxes would dies due to no food source. 

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

In the energy pyramid here, how much of the energy in the producers gets passed to the herbivores?

• 10%

• 20%

• 80%

• 90%

Tags

NGSS.MS-LS2-3

In the food web shown, the snail would be considered...

• primary consumer

• secondary consumer

• tertiary consumer

• producer

Tags

NGSS.MS-LS2-3