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1851.

Observe the picture given below depicting an activity performed to study action of certain part of human respiratory system. Identify and explain the action of the part in brief.

Answer» Observe the picture given below depicting an activity performed to study action of certain part of human respiratory system. Identify and explain the action of the part in brief.


1852.

What is the study of living things in relation to their environment called?

Answer» What is the study of living things in relation to their environment called?
1853.

What are the different ways in which water gets contaminated?​

Answer» What are the different ways in which water gets contaminated?​
1854.

What is the term used for secretions of certain glands that are responsible for changes taking place in the body?

Answer» What is the term used for secretions of certain glands that are responsible for changes taking place in the body?
1855.

How is small scale and large scale storage of grains done by farmers?

Answer» How is small scale and large scale storage of grains done by farmers?
1856.

Some grass is growing in a wheat field. What will it be known as ?

Answer»

Some grass is growing in a wheat field. What will it be known as ?

1857.

How do the sperm penetrate the egg through the defence barrier of the egg?

Answer»

How do the sperm penetrate the egg through the defence barrier of the egg?


1858.

__________________ is concerned with chemical secretions of the cell.

Answer»

__________________ is concerned with chemical secretions of the cell.


1859.

Which ingredients are used to make herbal tea?

Answer»

Which ingredients are used to make herbal tea?



1860.

What is black death?

Answer» What is black death?
1861.

Observe the given set of characteristics and identify the organism. i. Very elongated cylindrical body covered with large scales ii. No limbs, no ear, no eyelids iii. Tongue bifurcated

Answer»

Observe the given set of characteristics and identify the organism.
i. Very elongated cylindrical body covered with large scales
ii. No limbs, no ear, no eyelids
iii. Tongue bifurcated


1862.

What do you understand by animal husbandry ? Give examples of food products obtained from animals.[5 MARKS]

Answer» What do you understand by animal husbandry ?

Give examples of food products obtained from animals.[5 MARKS]
1863.

Long ribbon-like pollen grains are released underwater by

Answer»

Long ribbon-like pollen grains are released underwater by


1864.

Can a forest regenerate in a short period of time?

Answer» Can a forest regenerate in a short period of time?
1865.

Which of the following is an example of osmosis?

Answer»

Which of the following is an example of osmosis?

1866.

Question 6Which of the following feature is correct for a wildlife sanctuary?(a) It is an artificially created protected area for animals.(b) It is a protected area for threatened and endangered wild animals.(c) It is meant for conservation of only plant species.(d) Capturing and poaching of animals is strictly prohibited here.

Answer» Question 6

Which of the following feature is correct for a wildlife sanctuary?



(a) It is an artificially created protected area for animals.

(b) It is a protected area for threatened and endangered wild animals.

(c) It is meant for conservation of only plant species.

(d) Capturing and poaching of animals is strictly prohibited here.
1867.

The characteristic(s) shared by urea, uric acid, and ammonia is/are,(I) They are nitrogenous wastes (II) They all need a very large amount of water for excretion(III) They are equally toxic(IV) They are excretory products

Answer»

The characteristic(s) shared by urea, uric acid, and ammonia is/are,



(I) They are nitrogenous wastes

(II) They all need a very large amount of water for excretion

(III) They are equally toxic

(IV) They are excretory products



1868.

Fill in the blanks:(g) Ovulation is induced by a hormone called

Answer» Fill in the blanks:

(g) Ovulation is induced by a hormone called
1869.

Which of the following represent asexual reproduction?

Answer»

Which of the following represent asexual reproduction?



1870.

Question 73Explain the process of nutrition in Amoeba.

Answer»

Question 73

Explain the process of nutrition in Amoeba.



1871.

Mention the crop whose production has increased by blue revolution and yellow revolution .

Answer»

Mention the crop whose production has increased by blue revolution and yellow revolution .

1872.

Why does farmers rotate crops in the field ? Explain by saying 6 short points .

Answer»

Why does farmers rotate crops in the field ? Explain by saying 6 short points .

1873.

Are fishes osmoconformors or osmoregulators ? Explain.

Answer» Are fishes osmoconformors or osmoregulators ? Explain.
1874.

Question 25After observing the figure answers the following.a. Read the following statements and label them in the figure:(i) The part which produces female gametes. (ii) The part where the development of the baby takes place.(iii) The part through which the developing embryo passes to reach the uterus.b. Explain the future development of the embryo that would take place after it gets embedded in the uterus.

Answer» Question 25


After observing the figure answers the following.

a. Read the following statements and label them in the figure:


(i) The part which produces female gametes.

(ii) The part where the development of the baby takes place.

(iii) The part through which the developing embryo passes to reach the uterus.

b. Explain the future development of the embryo that would take place after it gets embedded in the uterus.



1875.

Which of the following is NOT a characteristic of a virus?

Answer»

Which of the following is NOT a characteristic of a virus?


1876.

What are the components of ecosystem? Explain with examples.

Answer» What are the components of ecosystem? Explain with examples.
1877.

Differentiate between sperm and egg.

Answer» Differentiate between sperm and egg.
1878.

___ is the sharing of car rides so that more than one person travels in the car, mainly to reduce fuel consumption.

Answer» ___ is the sharing of car rides so that more than one person travels in the car, mainly to reduce fuel consumption.
1879.

what is spon†an eity

Answer» what is spon†an eity
1880.

Q.what is meant by sensory nerve fiber

Answer» Q.what is meant by sensory nerve fiber
1881.

The life cycle in which haploid gametophyte phase is dominant is termed as-

Answer»

The life cycle in which haploid gametophyte phase is dominant is termed as-


1882.

I am sorry this doubt is also not in my syllabus. When someone donates blood doesn't the DNA of the giver mix with that of the recipient?

Answer» I am sorry this doubt is also not in my syllabus. When someone donates blood doesn't the DNA of the giver mix with that of the recipient?
1883.

Which of the following is/are characteristic(s) of permanent tissues?

Answer»

Which of the following is/are characteristic(s) of permanent tissues?


1884.

How do producers function in an ecosystem?

Answer» How do producers function in an ecosystem?
1885.

The Indian system of medicine 'Ayurveda' depends on ___

Answer»

The Indian system of medicine 'Ayurveda' depends on ___


1886.

Define the following terms: Reforestation Afforestation Agroforestry

Answer»

Define the following terms:




  1. Reforestation

  2. Afforestation

  3. Agroforestry



1887.

What are primary, secondary and tertiary consumer?

Answer» What are primary, secondary and tertiary consumer?
1888.

Why are antibiotics not effective against 'common cold' and 'flu'?

Answer»

Why are antibiotics not effective against 'common cold' and 'flu'?

1889.

does the cisternae in ER have 60S ribosome? if so, does it have subunits? which are the subunits? what are the subunits of the 70S ribosomes in prokaryotes?

Answer» does the cisternae in ER have 60S ribosome? if so, does it have subunits? which are the subunits? what are the subunits of the 70S ribosomes in prokaryotes?
1890.

Study of fungi is

Answer»

Study of fungi is


1891.

If living plants have living cells than why wood from plants is non living?

Answer»

If living plants have living cells than why wood from plants is non living?

1892.

Question 27 Unscramble the words related to crop production and its management and write in the boxes given beneath them. Now, using the circled letters, form one word which is an activity carried out in fields, after maturation of crops.

Answer» Question 27
Unscramble the words related to crop production and its management and write in the boxes given beneath them.

Now, using the circled letters, form one word which is an activity carried out in fields, after maturation of crops.
1893.

What is use of a plank

Answer»

What is use of a plank

1894.

Give reasons : Plantation of the same crop in a field over and over again should be avoided

Answer»

Give reasons : Plantation of the same crop in a field over and over again should be avoided

1895.

Question 18Match the agricultural implements given in Column A with their use given in Column B.Column AColumn B(i)Sickle(a)Ploughing(ii)Hoe(b)Sowing(iii)Seed Drill(c)Harvesting(iv)Sprinkler(d)Irrigation

Answer»

Question 18

Match the agricultural implements given in Column A with their use given in Column B.

Column AColumn B(i)Sickle(a)Ploughing(ii)Hoe(b)Sowing(iii)Seed Drill(c)Harvesting(iv)Sprinkler(d)Irrigation



1896.

To protect our flora and fauna and their natural habitats, protected areas have been earmarked where plantation, cultivation, grazing, felling trees, hunting and poaching are prohibited. What are these areas called? I. Biosphere reserve II. Wildlife sanctuary III. National paro IV. Zoo

Answer» To protect our flora and fauna and their natural habitats, protected areas have been earmarked where plantation, cultivation, grazing, felling trees, hunting and poaching are prohibited. What are these areas called?

I. Biosphere reserve
II. Wildlife sanctuary
III. National paro
IV. Zoo


1897.

How denticity of EDTA is 5 in Na_2\lbrack fe(oh)(edta)

Answer» How denticity of EDTA is 5 in Na_2\lbrack fe(oh)(edta)
1898.

If a scientist happens to discover a chemical which can kill all the microorganisms of the world. Give 3 reasons why he should be stopped from doing so.

Answer»

If a scientist happens to discover a chemical which can kill all the microorganisms of the world. Give 3 reasons why he should be stopped from doing so.

1899.

The cell wall is present in

Answer»

The cell wall is present in


1900.

Question 11Name the female hormone produced by ovaries that helps in development of mammary glands.

Answer» Question 11

Name the female hormone produced by ovaries that helps in development of mammary glands.