Single celled organism

• Name a type of bacteria.

  Ecoli
• How do single-celled organisms exchange gases?

  • By diffusion
  • Small and thin flat body
  • Large surface area to volume ratio
  • Short diffusion pathway
• What is the process by which oxygen is absorbed in single-celled organisms?

  Diffusion across the cell surface membrane
• How is carbon dioxide released in single-celled organisms?

  By diffusion across the cell surface membrane
• What is a characteristic of the body of single-celled organisms that aids gas exchange?

  Thin flat body
• What is the significance of a large surface area to volume ratio in single-celled organisms?

  It facilitates efficient gas exchange
• What is the term for the movement of gases across the cell surface?

  Diffusion
• What gas do single-celled organisms absorb?

  Oxygen
• What gas do single-celled organisms release?

  Carbon dioxide
• What is the cell surface membrane's role in gas exchange?

  It allows diffusion of gases