Question

which organisms make up the base of every single food chain, web or pyramid? select all that apply.
□ autotrophs
□ heterotrophs
□ producers
□ consumers
question 4
2 pts
an organism that must eat other organisms in order to survive is called a/an ____.
select all that apply.
□ heterotroph
□ producer
□ consumer
□ autotroph

Explanation:

First Question (Organisms at the base of food chains/webs/pyramids)

• Autotrophs (like plants, algae) produce their own food via photosynthesis/chemosynthesis, forming the base of food chains as they start energy flow.
• Producers are organisms (autotrophs) that create organic matter from inorganic sources, so they are the base. Heterotrophs/consumers rely on others for food, so they aren’t the base.

Second Question (Organisms that must eat others to survive)

• Heterotrophs can’t make their own food and must consume other organisms (e.g., animals, fungi).
• Consumers (herbivores, carnivores, omnivores) eat other organisms. Producers/autotrophs make their own food, so they don’t fit.

Answer:

A. autotrophs, C. producers