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51.

What is composting?

Answer» What is composting?
52.

Give another name for the winter sleep that extends throughout the winter.

Answer» Give another name for the winter sleep that extends throughout the winter.
53.

Which of these is an adaptation of a chameleon?

Answer»

Which of these is an adaptation of a chameleon?



54.

does simple squamous epithelial tissue have microvilli as they are majorly used for diffusion

Answer» does simple squamous epithelial tissue have microvilli as they are majorly used for diffusion
55.

Select the correct match of the digested products in humans given in colum I with their absorption site andmechanism in column II.

Answer»

Select the correct match of the digested products in humans given in colum I with their absorption site and

mechanism in column II.

56.

cos2x-cos2a/cosx-cosa find integral of this function

Answer» cos2x-cos2a/cosx-cosa find integral of this function
57.

Why do organisms/cells need oxygen?

Answer»

Why do organisms/cells need oxygen?


58.

The teeth are a part of the _____________ system.

Answer» The teeth are a part of the _____________ system.
59.

What would happen if living organisms did not have a definite life span?

Answer» What would happen if living organisms did not have a definite life span?
60.

Describe double circulation in human beings. Why is it necessary?

Answer» Describe double circulation in human beings. Why is it necessary?
61.

Which of the following organelles is not membrane-bound?

Answer»

Which of the following organelles is not membrane-bound?


62.

Question 1 (vi) Correct the following statements and rewrite them in your notebook. If the petals of a flower are joined together, then the pistil is joined to the petal.

Answer»

Question 1 (vi)

Correct the following statements and rewrite them in your notebook.
If the petals of a flower are joined together, then the pistil is joined to the petal.

63.

Plants utilize carbon dioxide during photosynthesis. Which gas so they give out in the process?

Answer»

Plants utilize carbon dioxide during photosynthesis. Which gas so they give out in the process?


64.

Which among the following is one notable difference between vitamins and minerals?

Answer»

Which among the following is one notable difference between vitamins and minerals?


65.

What are the difference in body characteristics between herbivores and carnivores

Answer»

What are the difference in body characteristics between herbivores and carnivores

66.

Question 21Choose the correct statement that describes arteries.(a) They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart. (b) They have thin walls with valves inside, blood flows under low pressure and carries blood away from the heart to various organs of the body.(c) They have thick elastic walls, blood flows under low pressure; carry blood from the heart to various organs of the body.(d) They have thick elastic walls without valves inside, blood flows under high pressure and carries blood away from the heart to different parts of the body.

Answer»

Question 21

Choose the correct statement that describes arteries.



(a) They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart.

(b) They have thin walls with valves inside, blood flows under low pressure and carries blood away from the heart to various organs of the body.

(c) They have thick elastic walls, blood flows under low pressure; carry blood from the heart to various organs of the body.

(d) They have thick elastic walls without valves inside, blood flows under high pressure and carries blood away from the heart to different parts of the body.



67.

Where does the food comes from and why it is essential to our growth?

Answer»

Where does the food comes from and why it is essential to our growth?

68.

Write a brief on vestigial organs.

Answer» Write a brief on vestigial organs.
69.

In a plant, one flower has all the 4 whorls intact, the other flower has shed the androecium and the corolla. What does this imply?

Answer»

In a plant, one flower has all the 4 whorls intact, the other flower has shed the androecium and the corolla. What does this imply?


70.

Briefly explain human breathing mechanism.

Answer» Briefly explain human breathing mechanism.
71.

Why alkali metal ions do not hydrolyse in water?

Answer» Why alkali metal ions do not hydrolyse in
water?
72.

Two types of components present in the environment are :

Answer»

Two types of components present in the environment are :


73.

Based on chemiosmosis, hydrogen ions accumulate in the ______ of the mitochondrion to create a large electrochemical gradient for aerobic cellular respiration.

Answer»

Based on chemiosmosis, hydrogen ions accumulate in the ______ of the mitochondrion to create a large electrochemical gradient for aerobic cellular respiration.


74.

The eggs of frogs do not have shells for protection, yet they are safe in water, how?

Answer» The eggs of frogs do not have shells for protection, yet they are safe in water, how?
75.

Which of the following are genetic diseases?

Answer»

Which of the following are genetic diseases?


76.

Question 1 (ii)Correct the following statements and rewrite them in your notebook.Leaves hold the plant upright.

Answer»

Question 1 (ii)



Correct the following statements and rewrite them in your notebook.

Leaves hold the plant upright.



77.

Plants are classified into herbs, shrubs and trees based on their ___.

Answer»

Plants are classified into herbs, shrubs and trees based on their ___.



78.

There are ___ main components of food.

Answer»

There are ___ main components of food.


79.

What is weeding? How is it helpful in agriculture?

Answer» What is weeding? How is it helpful in agriculture?
80.

What are stubs?

Answer»

What are stubs?

81.

Which of the following is the largest mammal?

Answer»

Which of the following is the largest mammal?


82.

Beneficial element but not an essential element in higher plants

Answer»

Beneficial element but not an essential element in higher plants


83.

We can move our arm forwards and backwards, up and down. (a) Which joint allows such movement?(b) Name another such joint present in our body?(c) Is the joint present in our knees similar to this joint?

Answer» We can move our arm forwards and backwards, up and down. (a) Which joint allows such movement?

(b) Name another such joint present in our body?

(c) Is the joint present in our knees similar to this joint?
84.

Which of the following is not part of the digestive system?

Answer»

Which of the following is not part of the digestive system?


85.

Name two diseases related to human digestive system.

Answer» Name two diseases related to human digestive system.
86.

What precautions will you take to justify “prevention is better than cure”.

Answer» What precautions will you take to justify “prevention is better than cure”.
87.

Match the following : (a) Digestive organs Shape of digestive organs Stomach Coil-like part Small intestine Part with bulges on the outside Large intestine Bag-like part (b) Digestive organ Digestive juice Small intestine Bile Liver Pancreatic juice Pancreas Intestinal juice

Answer»

Match the following :




















































(a)



Digestive organs



Shape of digestive organs





Stomach



Coil-like part





Small intestine



Part with bulges on the outside





Large intestine



Bag-like part



(b)



Digestive organ



Digestive juice





Small intestine



Bile





Liver



Pancreatic juice





Pancreas



Intestinal juice




88.

What is rough and smooth endoplasmic recticulam with labeled diagram?

Answer» What is rough and smooth endoplasmic recticulam with labeled diagram?
89.

Which of the following is used to obtain Vermicompost?

Answer»

Which of the following is used to obtain Vermicompost?


90.

Where do you get to see a closed loop recycling?

Answer»

Where do you get to see a closed loop recycling?


91.

How do our skeletal muscles contract? Explain

Answer» How do our skeletal muscles contract? Explain
92.

What is the location of chromosome ?

Answer»

What is the location of chromosome ?

93.

protects the flower at the bud stage.

Answer» protects the flower at the bud stage.
94.

What will happen if you breathe through your mouth?

Answer» What will happen if you breathe through your mouth?
95.

Write down food items which will turn blue black when iodine solution is added.

Answer»

Write down food items which will turn blue black when iodine solution is added.

96.

Name the different parts of a plant.

Answer» Name the different parts of a plant.
97.

Which of the following is a symptom of goitre?

Answer»

Which of the following is a symptom of goitre?



98.

Why do we consider the ripening of fruit as a desirable change?

Answer»


Why do we consider the ripening of fruit as a desirable change?



99.

Which of these things are non-living? Soil, Rocks, Stream of Water, Burrows, Plough, Mushroom, Sewing machine, Radio, Boat, Water hyacinth, Earthworm

Answer»

Which of these things are non-living?

Soil, Rocks, Stream of Water, Burrows, Plough, Mushroom, Sewing machine, Radio, Boat, Water hyacinth, Earthworm


100.

What is a stimulus?

Answer»

What is a stimulus?