Ecology = Unit 1

The non living parts of an ecosystem

• abiotic factors
• biotic factors
• producers

• trophic levels

the living parts of an ecosystem

• biotic factors
• trophic levels

• abiotic factors
• producers

According to the image, what is the producer?

• plant

• insect

• mouse

• snake

The word "primary" means "first."

If that's true, what does primary consumer mean?

Hint: look carefully at the food chain!

• the first organism in a food chain

• the first organism that consumes something else for energy

The efficiency of energy transfer from a lower trophic level to the next highest level is roughly

• 1%
• 10%
• 100%
• 1000%

In the energy pyramid here, how much of the energy in each level gets lost as heat or used by the organism for survival?

• 80%
• 90%
• 10%
• 20%

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.
• It shows how sunlight flows within an ecosystem.
• They show what direction the energy is flowing between organisms. 
• They represent how water is transferred within a habitat.

_{If the amount of food or resources (limiting factors) available increases, the carrying capacity for an animal.....}

• Stays the same

• Increases

• Decreases

• Fluctuates

This is the largest number of individuals of a population that the environment can support...

• carrying capacity

• ecosystem

• limiting factors

• trophic level

Water, sunlight, shelter, and space are resources that are often........

• abiotic limiting factors

• biotic limiting factors

• non-limiting factors

• exponetial factors