Photosynthesis and Energy Flow in Ecosystems
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Questions and Answers

What percentage of the energy having Photosynthetically Active Radiation is typically used by plants for the process of photosynthesis?

  • 50-60 percent
  • 10-20 percent
  • 2-10 percent (correct)
  • 30-40 percent

In what form is the energy stored in various organic products in plants during photosynthesis?

  • Kinetic energy
  • Mechanical energy
  • Heat energy
  • Chemical energy (correct)

What happens to the energy when it is converted into heat during the process of energy flow in the ecosystem?

  • Energy is converted back to light energy
  • Energy is stored in the ecosystem
  • Energy is absorbed by plants
  • Energy is lost from the ecosystem (correct)

Which consumers receive energy directly from the primary producers in a food chain?

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

What law states that only about 10 percent of the energy is transferred to each trophic level in a food chain?

<p>10 Percent Law (B)</p> Signup and view all the answers

Which organelle in plants is responsible for absorbing sunlight for the process of photosynthesis?

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

What is the main source of energy required by all living organisms in an ecosystem?

<p>Chemical energy of food (C)</p> Signup and view all the answers

Which law of thermodynamics states that energy can neither be created nor destroyed, only changed from one form to another?

<p>Second law of thermodynamics (D)</p> Signup and view all the answers

What is the term used to describe the radiation from the sun that can be used by plants for photosynthesis?

<p>Effective radiation (B)</p> Signup and view all the answers

What happens to most of the sun's radiation that falls on Earth?

<p>It is reflected back into space by the atmosphere (D)</p> Signup and view all the answers

What term is used to describe each level within a food chain?

<p>Trophic level (A)</p> Signup and view all the answers

Which law of thermodynamics states that as energy is transferred, more and more of it is wasted?

<p>Second law of thermodynamics (C)</p> Signup and view all the answers

What percentage of energy is typically transferred from one trophic level to the next?

<p>90% (C)</p> Signup and view all the answers

Which trophic level represents the primary consumers in an ecosystem?

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

What is the ultimate source of energy on Earth?

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

What process do plants utilize to convert light energy into chemical energy?

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

What are the scavengers responsible for in the food chain?

<p>Breaking down dead matter (C)</p> Signup and view all the answers

What do reducers do after absorbing constituents from dead matter in the food chain?

<p>Release molecules back to the environment (A)</p> Signup and view all the answers

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