Photosynthesis

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Questions and Answers

What is the primary purpose of photosynthesis?

  • To convert light energy into chemical energy (correct)
  • To fuel the organism's activities
  • To produce oxygen as a byproduct
  • To synthesize carbohydrate molecules

What is the byproduct of oxygenic photosynthesis?

  • Water
  • Hydrogen sulfide
  • Carbon dioxide
  • Oxygen (correct)

Which organisms are called photoautotrophs?

  • Fungi, bacteria, and protozoa
  • Viruses, archaea, and helminths
  • Plants, algae, and cyanobacteria (correct)
  • Animals, birds, and insects

What is responsible for producing and maintaining the oxygen content of the Earth's atmosphere?

<p>Photosynthesis (C)</p> Signup and view all the answers

What do some bacteria use as a reductant in anoxygenic photosynthesis?

<p>Hydrogen sulfide (D)</p> Signup and view all the answers

What is the primary role of decomposers?

<p>Break down dead or decaying organisms (B)</p> Signup and view all the answers

How do detritivores differ from decomposers?

<p>They ingest and digest dead matter internally (D)</p> Signup and view all the answers

Which kingdom primarily carries out the process of decomposition?

<p>Fungi (D)</p> Signup and view all the answers

What is the primary source of energy for decomposers?

<p>Organic substrates (C)</p> Signup and view all the answers

Why are invertebrates like earthworms considered detritivores and not decomposers?

<p>They are unable to absorb nutrients without ingesting them (C)</p> Signup and view all the answers

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