Unit 3.3

Question 1

What trophic level consumes only producers?

Answer 1

Primary Consumers

Question 2

What do producers do?

Answer 2

Producers turn light energy from the sun into energy that can be used and passed through the trophic levels.

Question 3

How do food webs and trophic cascades differ?

Answer 3

Food webs show which organisms/species consume others, while trophic cascades also show how these species affect each other.

Question 4

If an organism consumes only animals / meat, what is it?

Answer 4

a carnivore

Question 5

A dotted arrow with a positive sign next to it shows what kind of relationship between two species?

Answer 5

positive indirect relationship

Question 6

What is the difference between autotrophs and heterotrophs.

Answer 6

Autotrophs create their own energy, while heterotrophs get their energy by consuming other organisms.

Question 7

A simplified food web is shown. What trophic level is the ferret?

Grass > Mouse > Ferret > Eagle

Answer 7

Secondary, as it consumes a species that consumes a producer.

Question 8

An animal that consumes dead organic material is called a ___.

Answer 8

detritivore

Question 9

What is the relationship between the whale and the seaweed in the trophic cascade shown below?

Whale (-)> Fish (-)> Seaweed

Answer 9

positive indirect relationship

Question 10

If a species is on top of a food web, it means…

Answer 10

that no other species consume it.