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251.

What is the difference between agriculture and plantation? On the basis of the area they are grown and examples

Answer»

What is the difference between agriculture and plantation? On the basis of the area they are grown and examples

252.

What are the main changes experienced in the period of puberty

Answer» What are the main changes experienced in the period of puberty
253.

Choose the correct statement.In a sanctuary:

Answer»

Choose the correct statement.

In a sanctuary:



254.

(a) Which of the following belong to the same trophic level? Grass, Hawk, Rabbit, Frog, DeerGive reason for your choice.​(b) What is the difference between the food habits of organisms belonging to the first and third trophic levels. Give one example each of the organisms belonging to first and third trophic levels.

Answer» (a) Which of the following belong to the same trophic level?

Grass, Hawk, Rabbit, Frog, Deer

Give reason for your choice.

​(b) What is the difference between the food habits of organisms belonging to the first and third trophic levels. Give one example each of the organisms belonging to first and third trophic levels.
255.

What is fertilizer a type of a spray or email which comes out of a machine?

Answer» What is fertilizer a type of a spray or email which comes out of a machine?
256.

Question 30 What are the functions of cell wall in plant cells?

Answer»

Question 30
What are the functions of cell wall in plant cells?

257.

What is osmosis?

Answer» What is osmosis?
258.

Question 4For the metamorphosis of tadpoles which of the following elements must be available in water?(a) Chlorine(b) Carbon(c) Sulphur(d) Iodine

Answer» Question 4

For the metamorphosis of tadpoles which of the following elements must be available in water?



(a) Chlorine

(b) Carbon

(c) Sulphur

(d) Iodine
259.

is a measure of amount of dissolved oxygen required for decomposition of waste organic matter from water

Answer» is a measure of amount of dissolved oxygen required for decomposition of waste organic matter from water
260.

Identify the organism, which is not a Brown algae from the following options?

Answer»

Identify the organism, which is not a Brown algae from the following options?


261.

The primary function of the lymphatic system is

Answer» The primary function of the lymphatic system is
262.

List the physical changes that occur in girls during puberty.

Answer» List the physical changes that occur in girls during puberty.
263.

Why are pulses alternated with crop like wheat and rice

Answer»

Why are pulses alternated with crop like wheat and rice

264.

In the Calvin cycle the first product identified was 3-phosphoglyceric acid (PGA). How many carbon atoms does it have?

Answer» In the Calvin cycle the first product identified was 3-phosphoglyceric acid (PGA). How many carbon atoms does it have?
265.

__ is a chemical substance secreted by an endocrine gland, which is directly poured into the blood stream and acts on a target organ or cells.

Answer» __ is a chemical substance secreted by an endocrine gland, which is directly poured into the blood stream and acts on a target organ or cells.
266.

Which of these is/are NOT the function(s) of lysosomes?

Answer»

Which of these is/are NOT the function(s) of lysosomes?


267.

___ can be defined as the place where living organism lives.

Answer» ___ can be defined as the place where living organism lives.
268.

What is the number of chromosomes in somatic cells and gametes in humans?

Answer» What is the number of chromosomes in somatic cells and gametes in humans?
269.

What percentage of good bacteria and bad bacteria is present in our body ?

Answer» What percentage of good bacteria and bad bacteria is present in our body ?
270.

Question 12 Match the hormones given in Column A with their deficiency disease given in Column B. Colume AColume B(a)Thyroxine(i) Salt imbalance(b)Growth hormone(ii) Diabetes(c)Insulin(iii) Goitre(d)Adrenalin hormone(iv) Dwarfism

Answer»

Question 12
Match the hormones given in Column A with their deficiency disease given in Column B.

Colume AColume B(a)Thyroxine(i) Salt imbalance(b)Growth hormone(ii) Diabetes(c)Insulin(iii) Goitre(d)Adrenalin hormone(iv) Dwarfism

271.

What would be the Ψp of a flaccid cell? Which organisms other than plants possess cell wall?

Answer» What would be the Ψp of a flaccid cell? Which organisms other than plants possess cell wall?
272.

A black body is at 1227 degree C\:emits radiation with maximum intensity at a wavelength of 5000 ang if the temperature of the body is increased by 1000 degree C the maximum intensity will be observed at

Answer» A black body is at 1227 degree C\:emits radiation with maximum intensity at a wavelength of 5000 ang if the temperature of the body is increased by 1000 degree C the maximum intensity will be observed at
273.

How can we displace carbon from carbon dioxide?

Answer»

How can we displace carbon from carbon dioxide?

274.

Howdoes brains of a cockroach work

Answer» Howdoes brains of a cockroach work
275.

Question 35Would a Planaria cut vertically into two halves regenerate into two individuals? Complete Figure D and E by indicating the regenerated regions.

Answer»

Question 35

Would a Planaria cut vertically into two halves regenerate into two individuals? Complete Figure D and E by indicating the regenerated regions.





276.

In males which hormone helps in development of secondary sexual characters.

Answer»

In males which hormone helps in development of secondary sexual characters.


277.

What is blood pressure? How it is measured? What is systolic and diastolic pressure?

Answer» What is blood pressure? How it is measured? What is systolic and diastolic pressure?
278.

Statements: No cheetah is a leopard. Some leopards are tigers. All tigers are lions. Conclusions: I .Some cheetahs are not tigers. II. All cheetahs are tigers.

Answer»

Statements:

No cheetah is a leopard.

Some leopards are tigers.

All tigers are lions.

Conclusions:

I .Some cheetahs are not tigers.

II. All cheetahs are tigers.


279.

What happens if a meteorite falls on earth?

Answer»

What happens if a meteorite falls on earth?

280.

The function of prostate glands is production of _______.

Answer»

The function of prostate glands is production of _______.


281.

When do girls reach 100% of their height?

Answer»

When do girls reach 100% of their height?


282.

Question 1How does chemical coordination take place in animals?

Answer»

Question 1

How does chemical coordination take place in animals?



283.

In ___, the vegetables, fruits and other products that usually get damaged easily are stored.

Answer» In ___, the vegetables, fruits and other products that usually get damaged easily are stored.
284.

If the Vth step of an input is ‘meat plum slot cat not so sir at’, what will be the IInd step?

Answer»

If the Vth step of an input is ‘meat plum slot cat not so sir at’, what will be the IInd step?


285.

The master organ of endocrine system is _____________

Answer»

The master organ of endocrine system is _____________


286.

The table given below shows a list of organisms and their methods of reproduction. What do P, Q and R represent? OrganismMethod of reproductionSpongePPlanariaQHydraR

Answer»

The table given below shows a list of organisms and their methods of reproduction. What do P, Q and R represent?
OrganismMethod of reproductionSpongePPlanariaQHydraR


287.

The removal of unwanted plants growing along with a desired crop from the field is called __(irrigation/weeding).

Answer» The removal of unwanted plants growing along with a desired crop from the field is called __(irrigation/weeding).
288.

define photolysis?

Answer» define photolysis?
289.

What is the time period for atrial diastole and ventricular?

Answer» What is the time period for atrial diastole and ventricular?
290.

Complete the following food chain: Grass → Insects → Frog → ______ → Eagle

Answer»

Complete the following food chain:

Grass Insects Frog ______ Eagle


291.

Answer the following: [5 MARKS] 1) Why does topsoil have much more humus than subsoil? 2) What is the importance of humus to the soil?

Answer»

Answer the following: [5 MARKS]

1) Why does topsoil have much more humus than subsoil?

2) What is the importance of humus to the soil?

292.

The plant body of algae is also called as _____

Answer»

The plant body of algae is also called as _____


293.

Why are valves absent in arteries and present in veins?

Answer»

Why are valves absent in arteries and present in veins?

294.

How communicable diseases can be avoided?

Answer» How communicable diseases can be avoided?
295.

Question 35Classify the following terms into cells, tissues and organs and write in the tabular column given below.RBC, WBC, Nerve cell, blood, muscle, blood vessels, brain, heart, handCellTissueOrgan⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

Answer»

Question 35

Classify the following terms into cells, tissues and organs and write in the tabular column given below.



RBC, WBC, Nerve cell, blood, muscle, blood vessels, brain, heart, hand

CellTissueOrgan



296.

Give the entire explanation in detail of impulse formation in SA node of human heart.

Answer» Give the entire explanation in detail of impulse formation in SA node of human heart.
297.

Name three natural methods of manuring. Describe one of them in detail.

Answer» Name three natural methods of manuring. Describe one of them in detail.
298.

Describe me(by a picture)the Inter-relation among the neurons, nerve fibres and nerves?

Answer» Describe me(by a picture)the Inter-relation among the neurons, nerve fibres and nerves?
299.

By inserting a capillary tube upto depth l in water, the water rises to a height h. If the lower end of the capillary tube is closed inside water and capillary is taken out and closed end is opened. The Length of water remains in the tube is (here l>h)(1) Zero. (2) l+h (3) 2h. (4) h

Answer» By inserting a capillary tube upto depth l in water, the water rises to a height h. If the lower end of the capillary tube is closed inside water and capillary is taken out and closed end is opened. The Length of water remains in the tube is (here l>h)
(1) Zero. (2) l+h (3) 2h. (4) h
300.

What are antibiotics, pathogens, pasteurisation and nitrogen fixation?

Answer» What are antibiotics, pathogens, pasteurisation and nitrogen fixation?