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4201.

Name the three great cultural revolutions that favoured a steep rise in population. Mention two areas of medical sciences which have indirectly contributed to high growth in human population? [5 MARKS]

Answer»

Name the three great cultural revolutions that favoured a steep rise in population. Mention two areas of medical sciences which have indirectly contributed to high growth in human population? [5 MARKS]

4202.

Draw a labelled diagram of a myelinated neuron.

Answer» Draw a labelled diagram of a myelinated neuron.
4203.

CaSO4.xH20 looses 6.2 % of water upon heating. x=

Answer» CaSO4.xH20 looses 6.2 % of water upon heating. x=
4204.

Write the daily activities of Mahatma Gandhi and his followers in the Ashram to support sanitation workers.

Answer» Write the daily activities of Mahatma Gandhi and his followers in the Ashram to support sanitation workers.
4205.

Match the following parts of the ear with their functions.Parts of the earFunctions1. PinnaA. Vibrates and transmits sound waves to the ossicles2. TympanumB. Sends the audio impulses to the cerebrum3. Ear ossiclesC. Collects sound and directs it into the ear4. Auditory nerveD. Amplifies and transmits the sound to cochlea

Answer»

Match the following parts of the ear with their functions.


Parts of the earFunctions1. PinnaA. Vibrates and transmits sound waves to the ossicles2. TympanumB. Sends the audio impulses to the cerebrum3. Ear ossiclesC. Collects sound and directs it into the ear4. Auditory nerveD. Amplifies and transmits the sound to cochlea



4206.

In evolutionary terms, we have more in common with

Answer»

In evolutionary terms, we have more in common with


4207.

During ________, homologous chromosomes separate and dyads move to opposite poles of the spindle.

Answer»

During ________, homologous chromosomes separate and dyads move to opposite poles of the spindle.


4208.

Elecrical impulse travels in a neuron from : (a) dendrite → axon → axon end → cell body (b) cell body → dendrile → axon → axon end (c) dendrile →cell body → axon → axon end (d) axon end → axon → cell body → dendrite

Answer»

Elecrical impulse travels in a neuron from :

(a) dendrite axon axon end cell body

(b) cell body dendrile axon axon end

(c) dendrile cell body axon axon end

(d) axon end axon cell body dendrite

4209.

Explain how animals in Vertebrata are classified into further subgroups.

Answer» Explain how animals in Vertebrata are classified into further subgroups.
4210.

Monohybrid cross parents should be always ………………………

Answer»

Monohybrid cross parents should be always ………………………


4211.

In the pea plant, purple colour of flower is dominant over white colour. Progeny obtained by crossing pure purple flowered plants with white flowered plants are self-pollinated. The resulting plants produced are:

Answer»

In the pea plant, purple colour of flower is dominant over white colour. Progeny obtained by crossing pure purple flowered plants with white flowered plants are self-pollinated. The resulting plants produced are:


4212.

a newspaper has recently published a survey result which says that number of AIDS patients in the country are increasing . the report also says that the awareness about AIDS amongst the people is poor. you decide to help people fight against this disease. (A) what problem do you anticipate if you try to educate people of your village (B) how will you overcome that problem

Answer» a newspaper has recently published a survey result which says that number of AIDS patients in the country are increasing . the report also says that the awareness about AIDS amongst the people is poor. you decide to help people fight against this disease. (A) what problem do you anticipate if you try to educate people of your village (B) how will you overcome that problem
4213.

(a) Write the functions of each of the following parts in human female reproductive system (i) Ovary (ii) Uterus (iii) Fallopian Tubes (b) Write the structure and functions of placenta in a human female.

Answer» (a) Write the functions of each of the following parts in human female reproductive system
(i) Ovary (ii) Uterus (iii) Fallopian Tubes
(b) Write the structure and functions of placenta in a human female.
4214.

Question 23The number of pair(s) of sex chromosomes in the zygote of humans is(a) One(b) Two(c) Three(d) Four

Answer»

Question 23

The number of pair(s) of sex chromosomes in the zygote of humans is



(a) One

(b) Two

(c) Three

(d) Four



4215.

Stress kicks the endrocine into high gear. Justify your statement.

Answer»

Stress kicks the endrocine into high gear. Justify your statement.

4216.

Give two important characteristic features of stem cells?

Answer»

Give two important characteristic features of stem cells?

4217.

What characteristic is shared by simple diffusion and facilitated diffusion?

Answer»

What characteristic is shared by simple diffusion and facilitated diffusion?



4218.

Question 34Give two reasons for the appearance of variations among the progeny formed by sexual reproduction.

Answer»

Question 34

Give two reasons for the appearance of variations among the progeny formed by sexual reproduction.



4219.

Explain growth hormone in detail and diseases caused by its excess or lack of secretion.

Answer» Explain growth hormone in detail and diseases caused by its excess or lack of secretion.
4220.

"जो लोग चौकसी से हटते, वे अपने कपड़े बदलते, खाना खाते, पढ़ते, रेडियो सुनते और अपनी ड्यूटी के अन्य कार्य जैसे रेडियो की जाँच, इंजन की जाँच तथा व्यंजन सूची के अनुसार भोजन बनाने के लिए राशन देने का काम निबटाते।" इस वाक्य को कई छोटे-छोटे वाक्यों के रूप में भी लिखा जा सकता है जैसे– जो लोग चौकसी से हटते, वे अपने कपड़े बदलते। वे खाना खाते, पढ़ते और रेडियो सुनते। वे अपनी ड्यूटी के अन्य कार्य करते जैसे रेडियो की जाँच और इंजन की जाँच। वे व्यंजन सूची के अनुसार भोजन बनाने के लिए राशन देने का काम निबटाते। तुम इसी प्रकार नीचे लिखे वाक्य को छोट-छोटे वाक्यों में बदलो– प्रथम भारतीय नौका अभियान दल विश्व की परिक्रमा करके 54,000 किलोमीटर की दूरी मापकर 470 दिन की ऐतिहासिक यात्रा के बाद 10 जनवरी, 1987 को 6.00 बजे मुंबई बंदरगाह पहुँचा।

Answer»

"जो लोग चौकसी से हटते, वे अपने कपड़े बदलते, खाना खाते, पढ़ते, रेडियो सुनते और अपनी ड्यूटी के अन्य कार्य जैसे रेडियो की जाँच, इंजन की जाँच तथा व्यंजन सूची के अनुसार भोजन बनाने के लिए राशन देने का काम निबटाते।"



इस वाक्य को कई छोटे-छोटे वाक्यों के रूप में भी लिखा जा सकता है जैसे–



जो लोग चौकसी से हटते, वे अपने कपड़े बदलते। वे खाना खाते, पढ़ते और रेडियो सुनते। वे अपनी ड्यूटी के अन्य कार्य करते जैसे रेडियो की जाँच और इंजन की जाँच। वे व्यंजन सूची के अनुसार भोजन बनाने के लिए राशन देने का काम निबटाते।



तुम इसी प्रकार नीचे लिखे वाक्य को छोट-छोटे वाक्यों में बदलो–



प्रथम भारतीय नौका अभियान दल विश्व की परिक्रमा करके 54,000 किलोमीटर की दूरी मापकर 470 दिन की ऐतिहासिक यात्रा के बाद 10 जनवरी, 1987 को 6.00 बजे मुंबई बंदरगाह पहुँचा।

4221.

What is meant by nervous system?

Answer» What is meant by nervous system?
4222.

Newspaper reports about pesticide levels in ready-made food items are often seen these days are some states have banned these products.debate in groups the need for such bans.

Answer» Newspaper reports about pesticide levels in ready-made food items are often seen these days are some states have banned these products.debate in groups the need for such bans.
4223.

Regeneration of rhodopsin or the purplish pigment in the dark is called

Answer»

Regeneration of rhodopsin or the purplish pigment in the dark is called


4224.

_____________ is the most common chronic childhood disease.

Answer»

_____________ is the most common chronic childhood disease.


4225.

In meiosis, the division is

Answer»

In meiosis, the division is


4226.

Insufficient supply of blood to the heart muscle results in chest pain. This condition is called __________.

Answer»

Insufficient supply of blood to the heart muscle results in chest pain. This condition is called __________.


4227.

What is the difference between Internal respiration and external respiration and also state that where it occurs in our body

Answer» What is the difference between Internal respiration and external respiration and also state that where it occurs in our body
4228.

Feeling the tremors of an earthquake, a scared resident of seventh floor of a multi-storeyed building starts climbing down the stairs rapidly. Which hormone initiated this action?

Answer»

Feeling the tremors of an earthquake, a scared resident of seventh floor of a multi-storeyed building starts climbing down the stairs rapidly. Which hormone initiated this action?

4229.

Why petrol is exhaustible natural resources whereas sunlight is not? Explain​

Answer» Why petrol is exhaustible natural resources whereas sunlight is not? Explain​
4230.

If you remove the fimbriae from the bacterial cell, which one of the following will you expect to happen? ​​

Answer»

If you remove the fimbriae from the bacterial cell, which one of the following will you expect to happen?

​​


4231.

Explain the function of bar screens in a wastewater treatment plant.

Answer» Explain the function of bar screens in a wastewater treatment plant.




4232.

Explain how sexual reproduction gives rise to more viable variations than asexual reproduction. How does this affect the evolution of those organisms that reproduce sexually?

Answer»

Explain how sexual reproduction gives rise to more viable variations than asexual reproduction. How does this affect the evolution of those organisms that reproduce sexually?



4233.

How is the pain message sent to your brain when your finger gets accidently caught at the door?

Answer»

How is the pain message sent to your brain when your finger gets accidently caught at the door?

4234.

_______ are first true vascular plants.

Answer»

_______ are first true vascular plants.


4235.

Identify the portion of the brain responsible for involuntary actions and could even cause death if not protected against injuries.

Answer»

Identify the portion of the brain responsible for involuntary actions and could even cause death if not protected against injuries.


4236.

What will be dry weight (kgm–2) of tertiary consumer in an ecosystem if the dry weight of primary consumer is 37kgm–2?

Answer»

What will be dry weight (kgm2) of tertiary consumer in an ecosystem if the dry weight of primary consumer is 37kgm2?


4237.

A trait in an offspring of sexually reproducing organisms is influenced by:

Answer» A trait in an offspring of sexually reproducing organisms is influenced by:
4238.

Write overall equation of photosynthesis , also write different step of photosynthesis

Answer»

Write overall equation of photosynthesis , also write different step of photosynthesis

4239.

The circuit through the lungs where the deoxygenated blood is oxygenated before it enters the heart is called the ___ circulation.

Answer»

The circuit through the lungs where the deoxygenated blood is oxygenated before it enters the heart is called the ___ circulation.


4240.

Which of the following statement about Culex mosquito is false?

Answer»

Which of the following statement about Culex mosquito is false?


4241.

What is hypermetropia? State the two causes of hypermetropia. With the help of ray diagrams, show:(a) the eye-defect hypermetropia​(b) correction of hypermetropia by using a lens

Answer» What is hypermetropia? State the two causes of hypermetropia. With the help of ray diagrams, show:

(a) the eye-defect hypermetropia

​(b) correction of hypermetropia by using a lens
4242.

Which of the following are plastids?

Answer»

Which of the following are plastids?



4243.

what is compound and cocotus?

Answer» what is compound and cocotus?
4244.

What is astigmatism? What are its effects?

Answer»

What is astigmatism? What are its effects?



4245.

The product formed when muscles have a low oxygen supply is ________.

Answer»

The product formed when muscles have a low oxygen supply is ________.



4246.

________ diagram is the graphical representation of the possible genotypes of an offspring from a particular cross or breeding event.

Answer»

________ diagram is the graphical representation of the possible genotypes of an offspring from a particular cross or breeding event.

4247.

Both overproduction and underproduction of growth hormone leads to disorders in the body.Explain

Answer» Both overproduction and underproduction of growth hormone leads to disorders in the body.Explain
4248.

17.Why magnetic moment of cis platin is zero as it can be zero only when 0 unpaired e are present but ligand in cis platin are all weak ligand then why tbey will do pairing ?

Answer» 17.Why magnetic moment of cis platin is zero as it can be zero only when 0 unpaired e are present but ligand in cis platin are all weak ligand then why tbey will do pairing ?
4249.

Sound is produced in mammals

Answer»

Sound is produced in mammals



4250.

Inheritance is the process of transmission of parental characters to ___ .

Answer»

Inheritance is the process of transmission of parental characters to ___ .