Life Processes in Biology

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Questions and Answers

Which of the following processes is essential for the growth and repair of tissues?

  • Respiration
  • Photosynthesis
  • Cellular division (correct)
  • Excretion

Which process primarily converts nutrients into energy in living organisms?

  • Photosynthesis
  • Digestion
  • Metabolism (correct)
  • Fermentation

What role does excretion play in maintaining homeostasis?

  • Stores excess energy
  • Removes waste products (correct)
  • Increases blood pressure
  • Absorbs nutrients

Which of the following is NOT a life process essential for sustaining life?

<p>Observation (D)</p> Signup and view all the answers

What is the primary purpose of reproduction in living organisms?

<p>To ensure genetic diversity (A)</p> Signup and view all the answers

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Study Notes

Essential Processes for Life

  • Growth and repair of tissues rely on cellular division, particularly mitosis.
  • Nutrient conversion to energy is achieved primarily through cellular respiration.
  • Excretion is vital for removing waste products, helping maintain internal stability and homeostasis.

Life Processes

  • All life processes include growth, reproduction, metabolism, and response to stimuli; one process may not be essential for sustaining life.
  • Reproduction ensures the continuation of species, contributing to genetic diversity and evolutionary adaptation.

Homeostasis

  • Homeostasis is maintained through feedback mechanisms that regulate internal conditions despite external changes.
  • Excretory processes help control water balance, pH levels, and the concentration of ions, thereby aiding in homeostasis.

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