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What is Life? Defining Living Organisms

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Questions and Answers

Why do living organisms need to constantly maintain and repair their structures?

Because their ordered nature is prone to breaking down due to environmental effects (correct)

To acquire oxygen from outside the body

To produce energy for their daily activities

To maintain their body size

What is the primary source of energy for the maintenance processes in living organisms?

Food sources from outside the body (correct)

The environment

Chemical reactions in the body

The sun

What is the purpose of the process of respiration in living organisms?

To maintain body temperature

To acquire oxygen from outside the body for cellular needs (correct)

To produce carbon-based molecules

To break down molecules for energy

Why is visible movement not a sufficient characteristic to define life?

Because it does not account for molecular movements Signup and view all the answers

What type of chemical reactions are often used to break down molecules in living organisms?

Oxidising-reducing reactions Signup and view all the answers

What is the primary reason for the controversy about whether viruses are truly alive?

Their lack of molecular movement until they infect cells Signup and view all the answers

Why do living organisms require different nutritional processes?

Because they require different types of carbon-based molecules Signup and view all the answers

Why do we tend to associate growth or movement with living beings?

Because it is a common observable evidence for life Signup and view all the answers

What is the term used to describe the processes that perform the maintenance job in living organisms?

Life processes Signup and view all the answers

What do professional biologists consider necessary for life?

Invisible molecular movement Signup and view all the answers

What can be said about plants that are not visibly growing?

They are still alive Signup and view all the answers

What is the characteristic that can be observed in dogs, cows, and men that suggests they are alive?

Their ability to breathe Signup and view all the answers