Bio II: Ecology 2.1 - 2.3

What is the best definition of an ecosystem?

• a population of biotic and abiotic factors

• an area where only biotic factors are included

• a community of biotic and abiotic factors

• an area where only abiotic factors are included.

Which of the following would be considered biotic factors?

• fish

• rock

• coral

• water

• algae

Which of the following are considered abiotic factors?

• sunlight

• bison

• grass

• blue sky

• soil

Name the major source of energy that all living things depend on?

• soil

• grass

• sun

• oxygen

What is the niche of most birds? Check all that apply.

• To keep the population of insects at a manageable amount.

• To make honey

• To carry pollen to various places to keep plant and flower populations up.

• To decompose dead matter.

Choose the examples of producers. Check all that apply.

• Pine tree

• rabbit

• sunflower

• grass

• lizard

Black bears are consumers. They will eat insects, fish and berries. They are considered to be a(n)

• omnivore

• herbivore

• carnivore

• detrivore (decomposer)

Worms feed on dead matter. This is an example of

• omnivore

• carnivore

• herbivore

• detrivore (decomposer)

This is an example of a

• food chain

• food web

• Trophic levels

• Energy pyramid

If level 1 (the kelp) had 50, 000 k cal, level 3 would have

• 50 k Cal

• 500 kCal

• 5 k Cal

• 10000 kcal