Living Organisms: Identifying the Signs of Life
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Questions and Answers

What is a common evidence some people use to identify if plants are alive?

  • Growing over time
  • Being tall
  • Being green (correct)
  • Having flowers

Why do some people think plants are alive?

  • They grow over time (correct)
  • They have colorful leaves
  • They are tall
  • They can photosynthesize

What is one reason why using visible movement as the defining characteristic of life is not enough?

  • Plants can be still and alive (correct)
  • Animals don't always visibly move when breathing
  • Molecular movements are invisible to the naked eye
  • All living beings breathe visibly

What characteristic is necessary for life according to professional biologists?

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

Why do some consider viruses controversial in the context of being alive?

<p>They don't show visible movement (D)</p> Signup and view all the answers

What makes viruses controversial in terms of being classified as living organisms?

<p>They lack molecular movement (D)</p> Signup and view all the answers

Why do living organisms need to constantly maintain their structures?

<p>To prevent damage and breakdown due to environmental effects (C)</p> Signup and view all the answers

What provides the energy needed for the maintenance processes in living organisms?

<p>Food sources from the environment (B)</p> Signup and view all the answers

Which process involves the transfer of energy from outside the body of an organism to its internal structures?

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

Why do some organisms use oxidising-reducing reactions as a common means to break down molecules?

<p>To release energy stored in the food sources (C)</p> Signup and view all the answers

What is the role of respiration in living organisms?

<p>To acquire oxygen from the environment and break down food for cellular needs (D)</p> Signup and view all the answers

Why is it important for single-celled organisms to undergo cellular respiration?

<p>To release energy stored in food sources (A)</p> Signup and view all the answers
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