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Living Organisms: Identifying the Signs of Life

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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?

Molecular movements Signup and view all the answers

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

They don't show visible movement Signup and view all the answers

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

They lack molecular movement Signup and view all the answers

Why do living organisms need to constantly maintain their structures?

To prevent damage and breakdown due to environmental effects Signup and view all the answers

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

Food sources from the environment Signup and view all the answers

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

Nutrition Signup and view all the answers

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

To release energy stored in the food sources Signup and view all the answers

What is the role of respiration in living organisms?

To acquire oxygen from the environment and break down food for cellular needs Signup and view all the answers

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

To release energy stored in food sources Signup and view all the answers