Question

feed chains, food webs, and energy pyramids
practise
answer the following questions on food chains, food webs, and energy pyramids.
use the food chain below to answer questions 1 through 3.
food chain image: algae → snail → chicken (hen) → fox

1. which organism in the food chain is a producer?

a. algae
b. snail
c. chicken
d. fox

1. which organism in the food chain is a primary consumer?

a. algae
b. snail
c. chicken
d. fox

1. which organism in the food chain feeds on a secondary consumer?

a. algae
b. snail
c. chicken
d. fox
use the food web below to answer questions 4 through 7.
food web image: seeds → beetle, mouse, squirrel; beetle → bird; bird → snake; mouse → snake; squirrel → eagle; snake → eagle; bird → eagle

1. how many primary consumers does this food web include?

a. one
b. two
c. three
d. four

1. which of the following is a tertiary consumer?

a. beetle
b. mouse
c. bird
d. snake

1. which organism in the food web is not a predator?

a. bird
b. snake
c. eagle
d. squirrel

1. which organism in the food web is the top consumer?

a. bird
b. snake
c. eagle
d. squirrel

Explanation:

Step1: Identify producer (Q1)

Producers make their own food; algae do this via photosynthesis.

Step2: Identify primary consumer (Q2)

Primary consumers eat producers; snail eats algae.

Step3: Identify secondary consumer predator (Q3)

Secondary consumer is chicken; fox feeds on chicken.

Step4: Count primary consumers (Q4)

Primary consumers eat producers (seeds/beetle's food): beetle, mouse, squirrel, bird. Total = 4.

Step5: Identify tertiary consumer (Q5)

Tertiary consumers eat secondary consumers; snake eats bird (secondary consumer).

Step6: Identify non-predator (Q6)

Predators hunt other animals; squirrel only eats seeds, no predation.

Step7: Identify top consumer (Q7)

Top consumers have no predators; eagle has no natural predators here.

Answer:

1. A. algae
2. B. snail
3. D. fox
4. D. four
5. D. snake
6. D. squirrel
7. C. eagle