(a) Give the main points of difference between respiration in plants and respiration in animals
(b) Describe the exchange of gases which takes place in the leaves of plant (a) during daytime, and (b) at night.
(c) Which contains more carbon dixoide: exhaled air or inhaled air? Why?

(a) What is the difference between a thermal power plant and a hydro power plant ? (b) Which of the two causes serious air pollution and how ?

Which of the following statements are true about respiration ? (i) during inhalation, ribs move inward and diaphragm is raised (ii) the gaseous exchange takes place in the alveoli (iii) haemoglobin has greater affinity for carbon dioxide than oxygen (iv) alveoli increase surface area for the exchange of gases

Out of photosynthesis and respiration in plants, which process occurs: (a) all the time ? (b) Only at daytime ?

Fill in the following blanks with suitable words: (a) The organs of respiration in man are the ........ (b) The actual exchange of gases takes place in the ....... of the lungs. (c) ........ in the lungs provide a very large surface area for gaseous exchange. (d) Yeast undergoes.... respiration whereas Amoeba undergoes....... respiration (e) Gills are the breathing organs in......

(a) ''Respiration is a vital function of the body''. Justify this statement (b) What is the main difference between aerobic respiration and anaerobic respiration ? Give one example of each. (c) What type of repiration takes place (i) in yeast, and (ii) in humans ?

(a) Write the chemical eqution of the reaction which takes place during the burining of ethanol in air. (b)Why is ethanol used as a fuel ? (c ) State two uses of ethanol (other as a fuel).

The figure given below shows a small part of human lung where exchange of gases takes place. In which one of the option given below, the one part A, B, C or D is correctly identified along with its functions