Question

1. match each description with the appropriate term listed. place your answer in the blank space given.

i. trophic level ii. primary consumer iii. omnivore
iv. decomposer v. secondary consumer vi. food chain
vii. food web viii. ecological pyramid

______ a. the pathway along which food is transferred from one trophic level to the next trophic level
______ b. an organism that feeds on primary consumers
______ c. the division of species within an ecosystem based on their source of energy
______ d. an organism that eats both plants and animals
______ e. the interconnecting feeding relationships within an ecosystem
______ f. a small organism that breaks down complex, organic molecules into simpler organic molecules
______ g. a diagram that shows the relative amount of energy, the number of organisms, or the amount of matter contained at each trophic level in a food chain or food web
______ h. an organism that obtains its food by feeding on photosynthetic organisms

1. decide whether each statement is true (t) or false (f). place your answer in the blank space given.

______ a. an organism can only be at one trophic level in the energy pyramid.
______ b. a food chain always begins with the producers.
______ c. another name for a secondary consumer is a carnivore.
______ d. a food web is made up of a number of food chains.

Explanation:

20.

• a. A food chain shows the transfer of food between trophic levels.
• b. Secondary consumers eat primary consumers.
• c. Trophic level divides species by energy source.
• d. Omnivores eat both plants and animals.
• e. Food web is the inter - connecting feeding relationships.
• f. Decomposers break down complex organic molecules.
• g. Ecological pyramid shows energy, organism number or matter at trophic levels.
• h. Primary consumers feed on photosynthetic organisms.

• a. Some organisms can be at multiple trophic levels (e.g., bears can be primary and secondary consumers).
• b. Producers (like plants) are the base of a food chain as they convert sunlight into energy.
• c. Secondary consumers that eat only animals are carnivores.
• d. A food web is formed by multiple inter - connected food chains.

Answer:

a. vi. food chain
b. v. secondary consumer
c. i. trophic level
d. iii. omnivore
e. vii. food web
f. iv. decomposer
g. viii. ecological pyramid
h. ii. primary consumer

21.