Which of these statements is true about autotrophs, but not heterotrophs? they use sugar and oxygen to make carbon dioxide and water. they use chlorophyll and oxygen to make carbon dioxide and water. they use sunlight, water, and carbon dioxide to make sugars. they use sunlight, water, and oxygen to make chlorophyll.

The answer to your question is: the third one.

Explanation:

They use sugar and oxygen to make carbon dioxide and water. This statement is true for heterotrophs and also for autotrophs, so this option is wrong.

They use chlorophyll and oxygen to make carbon dioxide and water.   I think this option is wrong because autotrophs use chlorophyll and oxygen to make sugar. This option is wrong.

They use sunlight, water, and carbon dioxide to make sugars. This option is true. Autotrophs use sunlight, water and carbon dioxide to make sugars this process is called photosynthesis.

They use sunlight, water, and oxygen to make chlorophyll. Chlorophyll is not produce by combining sunlight, water and oxygen, it's produced by a different process. This option is wrong.

The correct answer is "They use sunlight, water, and carbon dioxide to make sugars".

Explanation:

Autotrophs, or primary producers, are organisms that produces complex organic compounds from nonliving components, usually from sunlight or inorganic chemical reactions. The most common mechanism at which autotrophs feed themselves is by photosynthesis, the process that involves the use of sunlight, water, and carbon dioxide to make sugars. During photosynthesis, autotrophs produce oxygen as by-product, which helps heterotrophs to perform cellular respiration.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.