61. The rate of breathing in _____________ animals in much faster than in _____________ animals.
Answer/Explanation
Answer:
Explanation: aquatic, terriestial
62. The actual exchange of gases takes place in the _____________ of the lungs.
Answer/Explanation
Answer:
Explanation: alveoli
63. _____________ are long, thin, spindle shaped cell with pits in their thick cell walls.
Answer/Explanation
Answer:
Explanation: Tracheids
64. The liqid part of blood is called _____________ .
Answer/Explanation
Answer:
Explanation: plasma
65. The expansion of an artery each time the blood is forced into it, is called _____________ .
Answer/Explanation
Answer:
Explanation: pulse
66. Gums and resins are the _____________ products of plants.
Answer/Explanation
Answer:
Explanation: waste
Direction (Q67 to Q68): Match Column I with Column II.
67.
| Column I | Column II |
| Animal | Respiratory Organ |
| (i) Fish | (A) Trachea |
| (ii) Birds | (B) Gills |
| (iii) Aquatic Arthropoda | (C) Lungs |
| (iv) Earthworm | (D) Moist cuticle |
Answer/Explanation
Answer:
Explanation:
(i) (B)
(ii) (C)
(iii) (A)
(iv) (D)
68.
| Column I | Column II |
| Region of digestive system | Digestive juice |
| (A) Mouth | (i) Pancreatic juice |
| (B) Stomach | (ii) Intestinal juice |
| (C) Duodenum | (iii) Gastric juice |
| (D) Small intestine | (iv) Saliva |
Answer/Explanation
Answer:
Explanation:
(A) (iv)
(B) (iii)
(C) (i)
(D) (ii)
69. Glomerulus acts as a dialysis bag. [True/ False]
Answer/Explanation
Answer:
Explanation: True
70. Bowman’s capsule is found in heart. [True/False]
Answer/Explanation
Answer:
Explanation: False
71. Peristaltic movement of muscles occurs in the mouth to push food into alimentary canal. [True/False]
Answer/Explanation
Answer:
Explanation: False
72. The release of energy in aerobic process is less than in anaerobic process. [True/False]
Answer/Explanation
Answer:
Explanation: False
73. Before testing for starch, chlorophyll has to be removed from the leaf as it interferes in the test for starch due to its green colour. [True/False]
Answer/Explanation
Answer:
Explanation: True
74. The process in which the absorbed food is taken in by body cells and used for energy, growth and repair is called egestion. [True/False]
Answer/Explanation
Answer:
Explanation: False
75. The length of small intestine in a human adult is about 3.5 m. [True/False]
Answer/Explanation
Answer:
Explanation: False
76. Carbohydrates are the components of our food which is digested by an enzyme which is present in saliva as well as in pancreatic juice. [True/False]
Answer/Explanation
Answer:
Explanation: True
77. Cytoplasm are the sites of aerobic respiration in the cells. [True/False]
Answer/Explanation
Answer:
Explanation: False
78. The respiration in plants occurs at a fast rate whereas the respiration in animals occur at a much slower rate. [True/False]
Answer/Explanation
Answer:
Explanation: False
79. What do you mean by life processes?
Answer/Explanation
Answer:
Explanation:
Processes which perform maintenance job in our body.
80. Name the activity of living beings which considered as indication of life?
Answer/Explanation
Answer:
Explanation: Movement.
81. Name the basic requirement of living organisms needed to obtain energy.
Answer/Explanation
Answer:
Explanation: Food
82. Name the process by which plants prepare food.
Answer/Explanation
Answer:
Explanation: Photosynthesis
83. Mention the raw materials required for photosynthesis. [CBSE 2014]
Answer/Explanation
Answer:
Explanation:
The raw materials required for photosynthesis are carbon dioxide and water in presence of sunlight and chlorophyll.
84. Name four nutrients needed by the plants which are taken up from the soil.
Answer/Explanation
Answer:
Explanation:
Nitrogen, phosphorus, iron, and magnesium.
85. Name the cell organelle in which photosynthesis occur. [DoE]
Answer/Explanation
Answer:
Explanation: Chloroplast
86. Name the green pigment present in the leaves of a plant.
Answer/Explanation
Answer:
Explanation: Chlorophyll.
87. In the experiment “Light is essential for photosynthesis”, why does the uncovered part of the leaf turn blue-black after putting iodine solution? [HOTS]
Answer/Explanation
Answer:
Explanation:
Starch is produced in the uncovered part of the leaf due to photosynthesis which turns blue-black in presence of iodine solution.
88. Name a unicellular organism which uses cilia to move food particles into its mouth.
Answer/Explanation
Answer:
Explanation: Paramoecium.
89. Mention how organisms like bread moulds and mushrooms obtain their food.
Answer/Explanation
Answer:
Explanation:
Organisms like bread moulds and mushrooms break down the food materials outside the body and then absorb it.
90. Classify the followings as saprotrophs or parasites:
leech, yeast, mushroom
Answer/Explanation
Answer:
Explanation:
Saprotrophs : yeast, mushroom
Parasites : leech
91. Which enzyme present in saliva breaks down starch?
Answer/Explanation
Answer:
Explanation:
The saliva contains an enzyme called salivary amylase that breaks down starch.
92. Why does our mouth ‘water’ when we see or eat a food which we really like?
Answer/Explanation
Answer:
Explanation:
Due to the production of saliva by the salivary glands in the mouth.
93. Why does bread taste sweet on mastication?
Answer/Explanation
Answer:
Explanation:
Salivary amylase act on starch of food and change it into a sweet sugar called maltose.
94. Which pancreatic enzyme is effective in digesting proteins?
Answer/Explanation
Answer:
Explanation:
Trypsin is the pancreatic enzyme which is effective in digesting proteins.
95. Where does digestion of fat take place in our body?
Answer/Explanation
Answer:
Explanation:
Digestion of fat takes place in the small intestine of our body.
96. What is alimentary canal?
Answer/Explanation
Answer:
Explanation:
It is a long tube extending from mouth to anus in which digestion and absorption of food takes place.
97. Define peristaltic movement? [DoE]
Answer/Explanation
Answer:
Explanation:
Peristaltic movement is defined as contraction and relaxation of muscles in the food pipe . which brings food down the pipe into the stomach.
98. Name the longest part of the alimentary canal.
Answer/Explanation
Answer:
Explanation:
Small intestine.
99. What is emulsification? [DoE]
Answer/Explanation
Answer:
Explanation:
Breakdown of large gloubule fats into smaller fats droplets is known as emulsification.
100. What is the name given to the biological catalyst which speed up the chemical reactions taking place in cells.
Answer/Explanation
Answer:
Explanation: Enzymes.
101. Name the muscle which regulates the exit of food from stomach to small intestine.
Answer/Explanation
Answer:
Explanation: Sphincter muscle.
102. How does the acidic medium in the small intestine is converted into alkaline for pancreatic enzymes?
Answer/Explanation
Answer:
Explanation: By the action of bile juice secreted by liver.
103. In which part of alimentary canal digestion does not occur?
Answer/Explanation
Answer:
Explanation: Large intestine
104. Name the structure which regulates the exit of waste material.
Answer/Explanation
Answer:
Explanation: Anal sphincter.
105. State the basic difference between the process of respiration and photosynthesis.
Answer/Explanation
Answer:
Explanation:
Respiration uses O2 and releases CO2 but in photosynthesis, CO2 is used and O2 is released.
106. Name the pigment present in human which aids in respiration.
Answer/Explanation
Answer:
Explanation: Haemoglobin.
107. Give one point which is common for both aerobic and anaerobic respiration.
Answer/Explanation
Answer:
Explanation:
In both aerobic and anaerobic respiration, the chemical used is glucose.
108. Why is anaerobic respiration less efficient?
Answer/Explanation
Answer:
Explanation:
Anaerobic respiration is the incomplete breakdown of glucose and produces less energy, so it is less efficient.
Fill in the Blanks
1. The exit of food from the stomach is regulated by a ………. muscle.
2. ………. is the longest part of the alimentary canal.
3. The process of breakdown of glucose, (a six-carbon molecule) into pyruvate, (a three-carbon molecule), takes place in the ………. .
4. ………. is the site of the complete digestion of carbohydrates, proteins and fats.
5. Breaking of pyruvate using oxygen takes place in the ………. .
6. Rings of cartilage are present in the wind pipe to ensure that the ………. .
7. The blood has ………. cells which plug the leakage in the vessels by helping to clot the blood at the point of injury.
8. ………. transports products of photosynthesis from the leaves to other parts of the plant.
Answers
1. sphincter
2. Small intestine
3. cytoplasm
4. Small intestine
5. mitochondria
6. air-passage does not collapse
7. platelet
8. phloem
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