AB Ecology Exam I Review

Question 1

Which population will be affected by the removal of the redfish in this food web

Accepted Answer

Clam Worm population will increase

Question 2

With a shortage of producers in a food web, both the deer and wolf will decrease because

Accepted Answer

organisms in this food web are interdependent

Question 3

According to the food web, Which organisms are paired with the way they get their energy?

Accepted Answer

mountain lion-predator; bark beetle-herbivore

Question 4

Which organism in the food web is both a primary consumer and a secondary consumer?

Accepted Answer

mouse

Question 5

Organisms use some energy, some can be passed on in a food chain, and the rest is

Accepted Answer

eliminated as heat

Question 6

Which statement best describes one of the species of heterotrophs in the data table?

Accepted Answer

Species D is most likely the top predator in the food chain

Question 7

Descreasing the rabbit population in the food web causes a decrease in what other population

Accepted Answer

mountain lion

Question 8

Which factor would have the greatest effect on the flow of energy into an ecosystem?

Accepted Answer

a large decrease in the amount of sunlight available

Question 9

Which type of organism can obtain energy directly from any of the organisms in an ecosystem?

Accepted Answer

decomposer

Question 10

Which of the following about the organization of an ecosystem is correct?

Accepted Answer

Species make up populations, which make up communities.

Question 11

If mountain lions in the food web are hunted & killed, what 2 species will increase in numbers

Accepted Answer

rabbit and deer

Question 12

Why does mass decrease from one level to another in a biomass pyramid?

Accepted Answer

energy is lost at each level, so less mass at higher levels

Question 13

What energy is passed from producers to the primary comsumers if producers start with 10,000J?

Accepted Answer

1000J

Question 14

What are two roles (jobs) that bacteria have in the environment?

Accepted Answer

Nitrogen fixation and decomposing dead matter

Question 15

Which energy pyramid shows the energy relationship between 3 organisms in the food web?

Accepted Answer

B

Question 16

The study of the interactions between organisms and the physical environment is known as

Accepted Answer

ecology

Question 17

The process by which organisms keep their internal conditions fairly balanced is called

Accepted Answer

homeostasis

Question 18

Which of the following is the most crucial role (job) of fungi in a balanced ecosystem?

Accepted Answer

They serve as decomposers and recycle nutrients

Question 19

Organisms need nutrients (food) in order to:

Accepted Answer

carry out essential life functions

Question 20

Which level of organization includes all of the other levels?

Accepted Answer

ecosystem

Questions 20