Life Processes Worksheet-7

Life Processes Worksheet-7


  1. Find the odd one out :

(i) Trachea, Bronchus, Alveolus, Diaphragm.

(ii) Epiglottis, Trachea, Malpighian corpuscles, Alveoli.


  1. State one function of the mucus membrane inside the nasal passage.


  1. Name the ultimate end parts of respiratory passages in mammalian lungs.


  1. Name a body part where anaerobic respiration takes place.


  1. How much light is utilised by the plants that fall on the earth?


  1. Name the cells of leaf where photosynthesis takes place.


  1. What are the end products of respiration?


  1. How does oxygen reach the cells in insects?


  1. Why do the divers carry oxygen for artificial respiration?


  1. Which cartilage of larynx forms "adam's apple" in man?


  1. What is the role of nasal cavity in respiration?


  1. What is normal breathing rate in an adult man at rest?


  1. What is the end product of photosynthesis?


  1. What are the functions of HCl in our stomach?


  1. Where do the carotenoid pigments absorb light in the spectrum?


  1. Which of the two - sun plants or shade plants have more chlorophyll in their leaves?


  1. What are the end products of fat digestion?


  1. Why are the digestive enzymes called as hydrolases?


  1. Which colour of the visible spectrum is most effective in photosynthesis?


  1. Why is the rate of photosynthesis more during a bright sunny day as compared to a cloudy day?



  1. (i) Diaphragm, (ii) Malpighian Corpuscles.


  1. It makes the air moist and traps the dust particles and microorganisms.


  1. Alveoli.


  1. Muscles.


  1. 0.2%.


  1. Palisade cells.


  1. CO2 and H2O.


  1. Through network of trachea.


  1. Because the divers are air breathers and not water breathers.


  1. Thyroid.


  1. Nasal cavity removes dust particles from air and air is made aseptic.


  1. 15 to 18 times per minute.


  1. ATP and NADPH.


  1. (i) It maintains strong acidic pH, (ii) It kills germs.


  1. They absorb light in the violet to blue regions.


  1. Shade plants.


  1. Fatty acids, monoglycerides and glycerol.


  1. Because they catalyse the breakdown of larger organic molecules with the addition of water.


  1. Red.


  1. Because intensity and temperature is higher on a bright sunny day.