Question:
Where does the blood absorb oxygen in the human body ?
Life Processes
Q 1.
Name two inorganic substances which are used by autotrophs to make food.
Q 2.
What are the final products after digestion of carbohydrates and proteins?
Q 3.
What is the name of tiny projections on the inner surface of small intestine which help in absorbing the digested food ?
Q 4.
Describe in brief the function of kidneys, ureters, urinary bladder and urethra.
Q 5.
Name one organism each having saprophytic, parasitic and holozoic modes of nutrition.
Q 6.
In which kind of respiration is more energy released?
Q 7.
What are the living organisms that cannot make their own food called?
Q 8.
Why do fishes die when taken out of water?
Q 9.
What are the adaptations of leaf for photosynthesis?
Q 10.
What will happen if platelets were absent in the blood?
Q 11.
What is saliva? State its role in the digestion of food.
Q 12.
Which of the organs perform the following functions in humans ?
(i) Absorption of food
(ii) Absorption of water
Q 13.
What substance is mixed with food in the mouth during chewing by the teeth ?
Q 14.
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…………..
Q 15.
State the three common features of all the respiratory organs like skin, gills and lungs.
Q 16.
Why and how does water enter continuously into the root xylem?
Q 17.
Why do the walls of the trachea not collapse’when there is less air in it?
Q 18.
Draw a neat diagram of excretory system of human beings and label the following:
(i) Kidney
(ii) Ureter
(iii) Urinary Bladder
(iv) Urethra
Q 19.
(a) Draw a sectional view of the human heart and label on it – Aorta, Right ventricle and Pulmonary veins.
(b) State the functions of the following components of transport system:
(i) Blood (ii) Lymph
Q 20.
Where does digestion of fat take place in our body?
Q 21.
Name an animal whose process of obtaining food is called phagocytosis.
Q 22.
Name a unicellular animal which uses cilia to move food particles into its mouth.
Q 23.
In which part of the digestive system is water absorbed ?
Q 24.
What is the name of the opening in the human body through which undigested food is thrown out ?
Q 25.
What are the functions of liver and pancreas in the human digestive system ?
Q 26.
Match the terms in column I with those in column II :
Q 27.
(a) Define nutrition. Why is nutrition necessary for an organism ?
(b) What are the different modes of nutrition ? Explain with one example of each mode of nutrition.
(c) Name the mode of nutrition in (i) roundworm, and (ii) Plasmodium.
Q 28.
What is the other name of wind-pipe ?
Q 29.
Describe the process of respiration in the following parts of a plant :
(a) Root (b) Stem (c) Leaves
Q 30.
Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms ?
Q 31.
Name the two stages in photosynthesis.
Q 32.
Name the parts of the digestive system of a grasshopper.
Q 33.
What happens to visible light of the Sun when it falls on chlorophyll?
Q 34.
How do the guard cells regulate opening and closing of stomatal pores?
Q 35.
Why is small intestine in herbivores longer than in carnivores?
Q 36.
What is the advantage of having four chambered heart?
Q 37.
Explain the process of nutrition in Amoeba.
Q 38.
State the role of the following in human digestive system :
(i) Digestive enzymes (ii) Hydrochloric acid (iii) Villi
Q 39.
Mention the raw materials required for photosynthesis.
Q 40.
List three characteristics of lungs which make it an efficient respiratory surface.
Q 41.
Draw a diagram of human excretory system and label renal artery and urethra.
State in brief the function of :
- renal artery
- kidney
- ureter
- urinary bladder
Q 42.
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 43.
What is translocation'in plants?
Q 44.
Mention how organisms like bread moulds and mushrooms obtain their food.
Q 45.
All the animals can be divided into three groups on the basis of their eating habits. Name the three groups.
Q 46.
How does Amoeba engulf the food particle ?
Q 47.
From which part of the body, undigested food is egested in Amoeba ?
Q 48.
What is the other name of food pipe ?
Q 49.
Where is digested food absorbed into blood in human body ?
Q 50.
(a) What are autotrophs ? Give one example of autotrophs.
(b) What are the conditions necessary for autotrophic nutrition ?
