oxygen
No, respiration itself does not require pigment molecules. Respiration is the process by which cells generate energy from nutrients. Pigment molecules are mainly involved in processes such as photosynthesis or oxygen transport.
Heterotrophs require oxygen as the essential atmospheric gas for cellular respiration, which is the process that generates ATP (energy) for their metabolic activities.
Oxygen is the gas that is required for respiration.
anaerobic respiration
Respiration occurs in two phases: anaerobic, which does not require oxygen, and aerobic which does require oxygen.
Oxygen
Diffusion is a body process that does not require energy from respiration.
Oxygen is the gas in the atmosphere that is important for respiration. It is needed by cells to generate energy through the process of cellular respiration.
Aerobic respiration requires oxygen and Anaerobic respiration does not require oxygen!
Most animals, including humans, require oxygen for respiration. This includes mammals, birds, reptiles, and many invertebrates. Additionally, some bacteria and fungi also require oxygen for their respiration processes.
cellular respiration
Animals require higher rate of respiration as they move from one place to another and therefore they need more energy. There the rate of respiration in animals is than in plants. They require more enrgy.