1. Directions: Read each statement carefully. Write the letter of the correct answer.
1. What is the purpose of a food chain?
a. shows what organisms eat which foods
b. depicts the predator/prey relationships between organisms
C. shows the transfer of energy between trophic levels
2. A gazelle eats grass and is later eaten by a tiger. Which is the prey?
a. Lion
b. tiger
c. grass
(d.gazelle
3. Organisms that exclusively feed on producers are
a. carnivores.
b. herbivores
c. omnivores
d. predators
4. What is a model that shows ALL the feeding relationships in an ecosystem?
a. Biospere
b. habitat
c. food chain
d. food web
5. What is the primary purpose of a food web?
a, illustrates what eats what
b. diagrams the apex predator in a chain
c. depicts the interconnectedness of organisms
d. shows the movement of energy in an ecosystem
6. Mushrooms and bacteria are considered
a. producers. b. consumers
C. carnivores
d. decomposers
7. The last component of the food chain is a
a. producer.
b. consumers
c. predator
d. decomposers
8. What organism cannot make its own food?
a. autotroph
b. chemotroph
c. heterotroph
d. producer
9. Suppose that the pesticides used by humans have killed many of the herbivores in an ecosystem. What
will most likely happen?
a. The populations of plants will increase, and the populations of carnivores will decrease.
b. The populations of carnivores will increase, and the populations of plants will decrease.
The populations of both plants and carnivores will decrease.
d. The populations of both plants and carnivores will increase.
10. Which type of organism breaks down the cells of dead organisms?
a. Consumer
b. decomposer
c. herbivore
d. omnivore