CBSE > Class 10 > Science | CBSE Board | Homework Help

Evolution cannot be equated with progress. The progressive trend in evolution is that more complex body design have emerged over time. Also, the older designs were not inefficient as the bacteria can survive most inhospitable habitats. Hence, the above sentence is justified.

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What is mean by incineration

Posted by Nithara K 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Nishtha Yadav 5 years, 3 months ago

Reduction to ash i.e. large substance put under high temperature (ignition temp.)

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Account Deleted 5 years, 3 months ago

Incineration is a waste treatment process that involves the combustion of organic substances contained in waste materials. Incineration and other high-temperature waste treatment systems are described as "thermal treatment". Incineration of waste materials converts the waste into ash, flue gas and heat.

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What is angular quantum no. ??

Posted by Nishtha Yadav 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Aditi Vaishya 5 years, 3 months ago

The azimuthal quantum number, also known as the (angular quantum number or orbital quantum number), describes the subshell, and gives the magnitude of the orbital angular momentum through the relation. ... Shape of orbital is also given by azimuthal quantum number.

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What is tessu

Posted by Sagar Bhati 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

Kartik Singh 5 years, 3 months ago

One and more cell are combine together make a tissue☺️

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Kiran Jain 5 years, 3 months ago

The spelling is wrong. The correct spelling is tissue.

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Mahak♥️ Gupta 5 years, 3 months ago

I don't know ?

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Sikun Panda 5 years, 3 months ago

Together a group of cell meet to form tissue

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Sachin Kumar 5 years, 3 months ago

Grouping of cell is called tissue

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What happens if magnesium ribbon is burnt

Posted by Divyanshi Sharma 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

B.Aishwarya 203 Kalyannagar 5 years, 3 months ago

Magnesium ribbon if burnt it combines with oxygen to form magnesium oxide. Mg+O2------------MgO

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Richa Singhal 5 years, 3 months ago

When magnesium ribbon is burnt in air magnesium oxide is formed. Mg + O = MgO

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Khushi Jain 5 years, 3 months ago

it burns with white dazling flame

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Bhumi Singh 5 years, 3 months ago

If magnesium ribbon is burned following reaction takes place: Mg + O = MgO (magnesium oxide)

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Nishtha Yadav 5 years, 3 months ago

Magnesium oxide(MgO) is formed

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Balance the equation CaSO42H2O gives (Ca(SO4)2H2O+H2O

Posted by Anamika Singh 5 years, 3 months ago

CBSE > Class 10 > Science

0 answers

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Tell me guys where I can found found best notes class 10

Posted by Prince Gujjar Sarkar 5 years, 3 months ago

CBSE > Class 10 > Science

4 answers

Daizy Garg 5 years, 3 months ago

In shobhit nirwan youtube channel... According to the boards. Best

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Pooja Kumari ?????? 5 years, 3 months ago

In magnet brain provide best notes of every subject

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King?Adithya H. M.. 5 years, 3 months ago

In is app you can found found best notes class 10

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Akhya Sahay 5 years, 3 months ago

In this app

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What is the pattern of magnetic field due to current carrying conductor

Posted by Roushni Nag 5 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Divyanshi Sharma 5 years, 3 months ago

The magnetic field lines originates from north pole and terminates at South pole so the pattern would be according to that only.....

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Hardik Itauriya 5 years, 3 months ago

It's concentric circles being centre as straight wire. You can also find direction by Maxwell Right hand rule.

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Nischal Shetty 5 years, 3 months ago

The magnetic field around a straight current carrying conductor is circular

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can anyone tell where can i find mock papers i would be greatly thankful

Posted by Khushi Jain 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Prince Gujjar Sarkar 5 years, 3 months ago

On telegram join edumans club where you will find all papers and pdf

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What is resitivity

Posted by Happy - 5 years, 3 months ago

CBSE > Class 10 > Science

4 answers

Nishtha Yadav 5 years, 3 months ago

Property that always remain constant

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Divyanshi Sharma 5 years, 3 months ago

See, the resistance of a unit length wire and unit cross sectional area is known as specific resistance or resistivity

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Nischal Shetty 5 years, 3 months ago

Resistivity is the resistance of a substance of length 1m and area 1m2

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Khushi Jain 5 years, 3 months ago

natural property of a conductor . depends on temp and metarial

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Dobereiner's traids limitations

Posted by Kumkum Kumari 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Nischal Shetty 5 years, 3 months ago

It could find only 3 triads from the elements known at that time

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Ashish Kumar 5 years, 3 months ago

Apna whatsapp no do

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How many of u all have completed the reading of all the sullybus of cbse 10th for the year 20-21

Posted by Laxmi S.P? 5 years, 3 months ago

CBSE > Class 10 > Science

4 answers

Francis Lalu 5 years, 3 months ago

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King?Adithya H. M.. 5 years, 3 months ago

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Akarsh Singh 5 years, 3 months ago

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Laxmi S.P? 5 years, 3 months ago

Any one plzzz tell me

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Any one tell me how to read effectively for board exams

Posted by Laxmi S.P? 5 years, 3 months ago

CBSE > Class 10 > Science

4 answers

Laxmi S.P? 5 years, 3 months ago

Thank u soo much who all answerd my question thank u

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Divyanshi Sharma 5 years, 3 months ago

Look, don't get tensed with ur boards....study with a free mind and try to manage some effective study hours which would really help u.....we are not living for boards, we are living hence boards are conducted....don't get stressed...good luck...

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King?Adithya H. M.. 5 years, 3 months ago

How TO Study for Boards: 10 Ways to Prepare for Your Board Exam Discover your learning style. ... Plan to put in the time. ... Start a study group. ... Avoid burnout. ... Exercise during your breaks. ... Take advantage of mobile resources to study for boards. ... Find a better study environment. ... Prioritize challenging subjects.

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Akarsh Singh 5 years, 3 months ago

Just study without any tension because the board exams are too easy than your school is organising exams and you should only prepare for time management.....best of luck. For your board exams

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How do carbohydrates, fats and protein get digested in human being

Posted by Astha Srivastava 5 years, 3 months ago

CBSE > Class 10 > Science

3 answers

Jeevan.G. Chaudhary 5 years, 3 months ago

●Carbohydrates will be converted to glucose.[Carbohydrates are the sugars, starches and fibers found in fruits, grains, vegetables and milk products.] ●Fats will be converted to fatty acids and glycerol.[When your body needs energy, it releases signals requesting a release from your various energy providing tissues. When your adipocytes receive this signal, it begins a process called Lipolysis. Lipolysis causes your fat cells to separate your free fatty acids and glycerol and release them into your blood stream.] ●Protein will be converted to amino acids.[Essential and Nonessential Amino Acids : They include alanine, asparagine, arginine, aspartic acid, glutamic acid, cysteine, glutamine, proline, glycine, serine, and tyrosine. Apart from these, there are other nine amino acids, which are very much essential as they cannot be synthesized by our body.] Small intestine recevies secretion from pancreas and bile of liver. Bile helps in emulsification of fats, whereas pancreas secrete enzymes such as trypsin for protein digestion.

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Jeevan.G. Chaudhary 5 years, 3 months ago

Small intestine recevies secretion from pancreas and bile of liver. Bile helps in emulsification of fats, whereas pancreas secrete enzymes such as trypsin for protein digestion. ●This is continuation of the above answer

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Jeevan.G. Chaudhary 5 years, 3 months ago

●Carbohydrates will be converted to glucose.[Carbohydrates are the sugars, starches and fibers found in fruits, grains, vegetables and milk products.] ●Fats will be converted to fatty acids and glycerol.[When your body needs energy, it releases signals requesting a release from your various energy providing tissues. When your adipocytes receive this signal, it begins a process called Lipolysis. Lipolysis causes your fat cells to separate your free fatty acids and glycerol and release them into your blood stream.] ●Protein will be converted to amino acids.[Essential and Nonessential Amino Acids: They include alanine, asparagine, arginine, aspartic acid, glutamic acid, cysteine, glutamine, proline, glycine, serine, and tyrosine. Apart from these, there are other nine amino acids, which are very much essential as they cannot be synthesized by our body.]

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Please provide me an easy diagram of nephron... And also tell me how to draw it...

Posted by Kumari Shalini 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Divyanshi Sharma 5 years, 3 months ago

You have to draw it with ur hands and a pencil

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Jeevan.G. Chaudhary 5 years, 3 months ago

https://images.app.goo.gl/vRhirdNpxxpDSGGh6 See this link is from bio ninja

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What are the main functions of kidneys???

Posted by Deep Arshnoor 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

Kartik Singh 5 years, 3 months ago

The main is purify the blood and remove urea and absorb nutrients and salt , amino acid ,etc???

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Nishtha Yadav 5 years, 3 months ago

Urine formation and blood purification

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Laxmi S.P? 5 years, 3 months ago

Purfycation of blood by the process of removing urea from our body

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Kumari Shalini 5 years, 3 months ago

The main functions of kidneys are to remove urea from our body and to purify our blood....

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Shreyas Shanker 5 years, 3 months ago

To purify blood

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The PH scale of a solution represent

Posted by Vikram Rawat 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Kumari Shalini 5 years, 3 months ago

The pH scale of a solution represents the concentration of H+ ions ...

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Deep Arshnoor 5 years, 3 months ago

Concentration of H ions

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I want to know more aboute chamical

Posted by Jannatul Tajrin 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Kumari Shalini 5 years, 3 months ago

To know more about chemicals, you have to study chemistry. Because it's the only branch of science that deals with the chemical compounds. And trust me if you are going to study chemistry, it will look very easy and very simple, I also ❤ chemistry.... The world of chemicals is really very fascinating...

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Write 5 point of Change in boys

Posted by Anisur Rahman 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Navuluru Chathrika 5 years, 3 months ago

Your voice gets lower or deeper. It may crack sometimes while it's changing, but that's totally normal and eventually goes away. ... Your ***** and testicles get bigger. Hair may grow on your face, chest, and back. Your chest and shoulders get broader. You may have swelling around your nipples during puberty. -

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Question.5. Write the full form of DNA. Name the part of the cell where it is located. Explain its role in the process of reproduction of the cell.

Posted by Francis Lalu 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

B.Aishwarya 203 Kalyannagar 5 years, 3 months ago

DNA Deoxy Ribo Nucleic Acid It is present in chromosomes in the nucleus of the cell.

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Akhil Yadav 5 years, 3 months ago

DNA is gandu thing which help us smoke our feelings

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Divyajoth Singh Dullet 5 years, 3 months ago

The full form of DNA is deoxyribonucleic acid. It is the genetic material found in the chromosomes which are present in the nucleus of a cell. Role of DNA in the process of repro¬duction of the cell:DNA plays an important role in the reproduction of a cell. The reproducing cell produces an identical copy of DNA through some cellular mechanism. Since the newly formed copy of DNA lacks an organised cellular structure the cell gets divided to provide cell cover to the newly formed DNA. Thus two daughter cells are formed from the single cell as a result of the copying of DNA

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Iswarya Tamilarasan R 5 years, 3 months ago

The full form of DNA is deoxyribonucleic acid. It is the genetic material found in the chromosomes, which are present in the nucleus of a cell. Role of DNA in the process of repro¬duction of the cell. DNA plays an important role in the reproduction of a cell. The reproducing cell produces an identical copy of DNA through some cellular mechanism. Since the newly formed copy of DNA lacks an organised cellular structure, the cell gets divided to provide cell cover to the newly formed DNA. Thus, two daughter cells are formed from the single cell as a result of the copying of DNA.

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Yogita Ingle 5 years, 3 months ago

The full form of DNA is Deoxyribonucleic acid. It is the hereditary material in humans and almost all other organisms.
It is found in nucleus of cell (where it is called nuclear DNA).
The first process in the reproduction of cell is the copying of DNA . It is the information source for making protein. So it is transmitted from parents to their offspring.

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Question.4. Name the information source of making proteins in the cell.

Posted by Francis Lalu 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Divyajoth Singh Dullet 5 years, 3 months ago

DNA

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Yogita Ingle 5 years, 3 months ago

The DNA in the nucleus of a cell is the information source for making proteins. If the information is changed, different proteins will be made. The basic event in reproduction is the creation of a DNA copy. Cells use chemical reactions to build copies of their DNA. This creates two copies of the DNA in a reproducing cell and they need to get separated from each other. DNA copying is accompanied by the creation of an additional cellular apparatus, and then the DNA copies separate, each with its own cellular apparatus.

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Question.3 “Variations that confer an advantage to an individual organism only will survive in a population.” Justify.

Posted by Francis Lalu 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 3 months ago

Useful variations give advantage to individuals in obtaining more food, adaptation to environmental changes and higher success in the struggle for existence. They give benefit in survival and reproduction. Differential reproduction increases the useful variations in the populations. Other individuals with harmful variations will be eliminated. For example, some bacteria have ability to tolerate high temperature. In warm environment non-tolerant bacteria will be killed. Others with tolerance to high temperature will survive and multiply.

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Question.2 Mention the importance of DNA copying in reproduction. Answer. The importance of DNA copying in reproduction are as follows: (i) DNA copying is called DNA replication. In this process, one copy each of replicated DNA will be passed to daughter cells. (ii) Variations may be introduced during DNA copying. This inbuilt tendency for variation during reproduction forms the basis of evolution.

Posted by Francis Lalu 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Francis Lalu 5 years, 3 months ago

Answer. The importance of DNA copying in reproduction are as follows: (i) DNA copying is called DNA replication. In this process, one copy each of replicated DNA will be passed to daughter cells. (ii) Variations may be introduced during DNA copying. This inbuilt tendency for variation during reproduction forms the basis of evolution.

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Question.1. What is the effect of DNA copying which is not perfectly accurate on the reproduction process? Answer. DNA copying is not perfectly accurate and the resultant errors are a source of variations in populations of organisms.

Posted by Francis Lalu 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 3 months ago

The DNA copying which is not perfectly accurate in the reproduction process results in variations in populations for the survival of species. If the variation are more drastic then the DNA will not be able to function properly leading to the death of the cell.

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Francis Lalu 5 years, 3 months ago

Answer. DNA copying is not perfectly accurate and the resultant errors are a source of variations in populations of organisms.

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5.why do offsprings formed by asexual reproduction exhibit remarkable similarity?

Posted by Francis Lalu 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Nishtha Yadav 5 years, 3 months ago

Because of very less amount of variation

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Yogita Ingle 5 years, 3 months ago

Clones are theoffsprings produced by one parent through asexual reproduction. These genetically identical to the parent. The clones possess exact copies of the DNA of their parent and hence show remarkable similarity to the parent and to one another.

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4. Why do certain plants use means of asexual reproduction and not the seeds ?Name few such plants?

Posted by Francis Lalu 5 years, 3 months ago

CBSE > Class 10 > Science

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3.Regeneration cannot be regarded as a method of reproduction in complex organisms why?

Posted by Francis Lalu 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

B.Aishwarya 203 Kalyannagar 5 years, 3 months ago

Regeneration cannot reproduce by complex organisms because Regeneration is done by totipotent cells which are not present in complex organisms

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Yogita Ingle 5 years, 3 months ago

Complex organisms have other features which do not help them to give rise to regeneration. Few reasons are listed below

Complex multicellular organisms cannot give rise to new organism because the tissue and specialised cell make up the organs in the body. Due to this high degree of specialisation, multicellular organisms cannot reproduce by regeneration of a part of some tissue.
Organisms at higher complex levels cannot give rise to new individuals through regeneration because they have organization of their organs system at different levels.
All these organ systems are interconnected and work in full coordination. They can regenerate a few of their lost body parts like skin, blood, muscles, etc. but can’t give rise to new individuals.

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2.why are budding ,fragmentation, and regeneration all considered as asexual types of reproduction?

Posted by Francis Lalu 5 years, 3 months ago

CBSE > Class 10 > Science

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1.reproduction is essentially a phenomenon that is not for survival of an individual but for the stability of a species justify.

Posted by Francis Lalu 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 3 months ago

(a) For survival an individual needs energy which it obtains from life processes such as nutrition and respiration.
(b) Reproduction does not provide energy.

(c) Reproduction ensures transfer of genetic material from one generation to the next which helps in continuation of species.

Thus, reproduction does not help survive rather its an energy consuming process, however it is essential for the continuation of the species

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