Respiration in Organisms Notes

• In plants, food that is manufactured in the form of starch needs to be broken down to release energy.
• Respiration is a vital function in plants. It is represented as:

Starch (Sugar) + Oxygen → Energy + Carbon dioxide + Water

Respiratory system in plants

• Respiration occurs in the presence of oxygen as well as in the absence of oxygen. So, respiration is primarily of two types:

    (i)  Aerobic respiration

    (ii) Anaerobic respiration

Aerobic Respiration:

(1)    An Experiment to Show That Exhaled Air Has Carbon Dioxide:

Requirements:

• Two disposable glasses with covers and a hole on top, two straws, and limewater

Procedure:

• Fill both the glasses with limewater.
• Put straws in both the glasses. Air enters in one of the glasses through the straw.
• In the second, blow out some air (exhaled air).

Observation: