3.2 Study Guide

Question 1

What does heterotroph mean?

Answer 1

It means organsims getting their energy from other organisms.

Question 2

What is shown in a pyramaid of biomass?

Answer 2

it shows the flow of energy between producers and consumers.

Question 3

True or False: It goes….
Producer –> primary consumer –> secondary consumer –> teritary consumer

Answer 3

True.

Question 4

Are the primary consumers usally herbivores?

Answer 4

Usually yes becuase the they mostly only eat the producers that are clearly not meat.

Question 5

What is the difference between a direct and indirect effect in a trophic casacade.

Answer 5

Direct effects is changes in the enviorment which cna be negative or positive while indirect is changes of a species’ predators, compititors, or prey.

Question 6

What is the rule of 10 and how does it apply to ecological pyramid models?

Answer 6

The rule of 10 is that as the enargy is passed in an ecosystem only 10 percent will be passed on.

Question 7

Why is it considered more efficient to eat at a lower trophic level vs. a higher trophic level?

Answer 7

It is becuase energy is lost in the transfer from one level to the next, there is successively less total energy as you move up trophic levels.