3. Autotrophs ...
O A. make their own food
O B. are the base of the
food chain
o C. are primary producers
o D. all of the above

D: all of the above

Explanation:

Autotrophs have photosynthesis so they are like plants they make their food by photosynthesis they are base of the food chain because other animals eat it

the correct answer is D.

Explanation:

Autotrophs make their own food, which also makes them the start of every food chain. Primary producers make their own food so all three answers are correct which makes the answer all of the above.

oceans

indian ocean

pacific ocean

atlantic ocean

arctic ocean

southern ocean

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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explanation: