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BIOLOGY: topic 1, concept 1

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Questions and Answers

What is a common feature of all lifeforms?

Presence of genetic information (correct)

Inability to evolve

Ability to extract energy

Lack of cellular structure

What is a benefit of viruses according to the text?

Independence from evolution

Ability to replicate (correct)

Extraction of energy

Presence of cells

What evidence does DNA provide to explain evolution?

Identical genes across all life (correct)

Lack of common origin among species

Diverse genetic codes in different species

Non-evolutionary changes in genetic makeup

When did life arise on Earth?

Hadean Era Signup and view all the answers

What forces created life on Earth according to different hypotheses?

Spontaneous generation from inorganic matter Signup and view all the answers

What contributes to the high specific heat of water?

Hydrogen bonds Signup and view all the answers

Why are carbon, hydrogen, nitrogen, and oxygen referred to as major elements of life?

They are essential for the survival and functioning of most life forms. Signup and view all the answers

What is the main reason behind carbon being considered the basic building block of life?

It can form various types of chemical bonds due to its versatility. Signup and view all the answers

What type of intermolecular forces are responsible for hydrogen bonds?

Dipole-dipole interactions Signup and view all the answers

How do stromatolites provide evidence for the beginning of life on Earth?

By trapping bacteria in limestone layers and allowing fossilization. Signup and view all the answers