Ecology pt 1 Gen Bio

A limiting factor that depends on population size.

• hunting

• density-dependent factor

• niche

• commensalism

Name an omnivore in this food web.

• plantain

• titmouse

• snake

• grasshopper

How much energy is transferred to the next trophic level in an ecosystem?

• 10%

• 90%

• 50%

• 100%

An organism that uses energy to produce its own food supply from inorganic compounds is called a(n)

• autotroph

• consumer

• heterotroph

• detritivore

Refer to the illustration. Among all of the food chains, the organisms at the highest trophic level are

• the krill

• the algae

• the crabeater seals

• the killer whale

What is the term for each step in the transfer of energy and matter within a food web?

• energy path

• food pyramid

• trophic level

• food chain

The symbiotic relationship between a flower and the insect that feeds on its nectar is an example of

• commensalism because the insect does not harm the flower and the flower does not benefit from the relationship.

• parasitism because the insect lives off the nectar from the flower

• mutualism because the flower provides the insect with food and the insect pollinates the flower

• predation because the insect feeds on the flower

A symbiotic relationship in which both species benefit is

• mutualism

• predation

• commensalism

• parasitism

Refer to the illustration above. On the pyramid, animals that feed on plant eaters are on what level?

• level 1

• level 2

• level 3

• level 4

All of the interconnected feeding relationships in an ecosystem make up a food

• interaction.

• chain.

• network.

• web.