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Questions and Answers

What is the region bounded by two concentric circles called?

  • Circumference
  • Arc
  • Annulus (correct)
  • Chord

What is the point equidistant from all points on the circle called?

  • Arc
  • Centre (correct)
  • Annulus
  • Circumference

What is a line segment whose endpoints lie on the circle called?

  • Centre
  • Chord (correct)
  • Arc
  • Circumference

What is any connected part of a circle called?

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

What is the distance between any point of the circle and the centre called?

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

Explain the challenges in defining life, especially when considering viruses.

<p>The challenges in defining life include distinguishing biological processes from non-biological matter, and the replication of viruses only within host cells, making it difficult to categorize them as living or non-living.</p> Signup and view all the answers

Describe the different philosophical definitions of living systems that have been proposed.

<p>Various philosophical definitions of living systems have been proposed, such as self-organizing systems, which aim to explain the organization and behavior of living organisms.</p> Signup and view all the answers

Discuss the presence of life in extreme environments and the organisms that inhabit them.

<p>Life exists in harsh environments, occupied by extremophiles, which are organisms adapted to survive and thrive in extreme conditions such as high temperatures, salinity, or acidity.</p> Signup and view all the answers

Explain the ancient theories about the nature of life, as proposed by Empedocles and Aristotle.

<p>Empedocles's materialism theory asserts that life was composed of four eternal elements, while Aristotle's hylomorphism theory posits that living things have souls and embody both form and matter.</p> Signup and view all the answers

When did life originate, and what is the concept of a universal common ancestor?

<p>Life originated at least 3.5 billion years ago, resulting in a universal common ancestor, from which all living organisms have evolved over time.</p> Signup and view all the answers

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