Question:
State the function of epiglottis.
Answer:
Epiglottis prevents the food from entering into the trachea.
Life Processes
Q 1.
What are the different ways in which glucose is oxidised to provide energy in various organisms ? Give one example of each.
Q 2.
What are the functions of the liver and the pancreas?
Q 3.
Other than chlorophyll, which other pigment is necessary for photosynthesis?
Q 4.
What will happen if mucus is not secreted by the gastric glands?
Q 5.
(a) Draw a diagram of excretory system in human beings and label the following parts. Aorta, kidney, urinary bladder and urethra.
(b) How is urine produced and eliminated ?
Q 6.
What is saliva? State its role in the digestion of food.
Q 7.
How are the alveoli designed to maximise the exchange of gases?
Q 8.
Define (i) saprophytic nutrition (ii) parasitic nutrition, and (iii) holozoic nutrition. Give one example of each type.
Q 9.
What type of respiration takes place in human muscles during vigorous physical exercise ? Give reason for your answer.
Q 10.
Describe the process of respiration in State whether it is anaerobic respiration or aerobic respiration.
Q 11.
Define nutrition? What are the different modes of nutrition?
Q 12.
Give two points of differences between respiration in plants and respiration in animals.
Q 13.
What are the living organisms that cannot make their own food called?
Q 14.
What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration.
Q 15.
Describe double circulation in human beings. Why is it necessary?
Q 16.
Is nutrition' a necessity for an organism? Discuss.
Q 17.
What is the advantage of having four chambered heart?
Q 18.
Explain the role of mouth in digestion of food.
Q 19.
Name the correct substrates for the following enzymes
(a) Trypsin (b) Amylase (c) Pepsin (d) Lipase
Q 20.
Why and how does water enter continuously into the root xylem?
Q 21.
Draw a diagram of human respiratory system and label on it :
(i) Diaphragm (ii) Larynx
Q 22.
Name the intermediate and the end products of glucose breakdown in aerobic respiration.
Q 23.
All the animals can be divided into three groups on the basis of their eating habits. Name the three groups.
Q 24.
What substance is mixed with food in the mouth during chewing by the teeth ?
Q 25.
Do all cells use oxygen to produce energy ?
Q 26.
Name one substance which is produced in anaerobic respiration by an organism but not in aerobic respiration.
Q 27.
Name one organism which can live without oxygen.
Q 28.
Name an animal which absorbs oxygen through its moist skin.
Q 29.
The trachea divides into two tubes at its lower end. What is the name of these tubes ?
Q 30.
Where does the blood absorb oxygen in the human body ?
Q 31.
Name the red pigment which carries oxygen in blood.
Q 32.
Which gases are exchanged in your lungs ?
Q 33.
(a) What is meant by aquatic animals and terrestrial animals ?
(b) From where do the aquatic animals and terrestrial animals obtain oxygen for breathing and respiration ?
Q 34.
Name the factors, which affect photosynthesis.
Q 35.
Define a herbivore and a carnivore.
Q 37.
In which kind of respiration is more energy released?
Q 38.
What is compensation point?
Q 39.
What are the necessary conditions for autotrophic nutrition and what are its byproducts?
Q 40.
What is the significance of emulsification of fats?
Q 41.
Explain the process of nutrition in Amoeba.
Q 42.
Name the acid presents in the following:
(i) Tomato (ii) Vinegar (iii) Tamarind
Q 43.
State the role of the following in human digestive system :
(i) Digestive enzymes (ii) Hydrochloric acid (iii) Villi
Q 44.
Mention the raw materials required for photosynthesis.
Q 45.
Draw a neat diagram of excretory system of human beings and label on it:
(i) Left kidney (ii) Urinary bladder
Q 46.
Name the green dot like structures in some cells observed by a student when a leaf peel was viewed under a microscope. What is this green colour due to?
Q 47.
What is translocation'in plants?
Q 48.
Which of the following is an autotroph ? Green plant or Man
Q 49.
In addition to carbon dioxide and water, state two other conditions necessary for the process of photosynthesis to take place.
Q 50.
(a) Name a gas used in photosynthesis.
(b) Name a gas produced in photosynthesis.
