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188 comments:

SHAKTI said...

q- what is the importance of variation in human organism?

shivraj rath said...

ANSWER TO SHAKTI'S QUESTION
(A) Pre adaptation -Variation function as pre adaptation to environmental changes like increase or decrease in temperature, drought, antibiotic resistance, pesticide resistance etc. ( B) Individuality- As variation provides individuality we recognise each other. (C) Evolution-Provides raw material for evolution or formation of new species.

richa said...

Q.During gamete formation 1 chromosome from each pair is taken away.Then how the original number of chromosomes are restored in the parent's body?

charan said...

q-how genes control traits ?

richa said...

Q1. Why are the alveoli of lungs covered with blood capillaries?

Q2.What are the two vital functions of kidney?

uma shankar said...

Q- please sent one mark question.

uma shankar said...

q please explain the mechanism of breathing as well as explain the functioning of artificial kidney ?

ranbir said...

q-how isotope dating helps to determine the age of fossils ?

BIPLAB said...

What is mutation?Why and How does it occur?What are it's good and bad effects?

What determined the racial color of the people(whites, blacks, cacusians) and what led to such a pattern of human evolution?

BIPLAB said...

Which biochemical processes in our body lead to variation and evolution?

shivraj rath said...


Click here for one mark questions

shivraj rath said...

ANSWERS TO ABOVE QUESTIONS

1.Original numbers of chromosomes are restored during zygote formation by fertilisation process. An organism is diploid, means each cell contains 2n number of chromosomes. During gamete formation only n number chromosomes move to gamete. At the time of fertilisation when male and female gamete fuses again 2n number of chromosomes formed in zygote.
2.Genes are fragments of DNA They are expressed in the form of proteins (enzyme). They regulate a trait in terms of synthesizing protein(enzyme). For e.g. gene for growth of body synthesize protein. That protein (enzyme) if works efficiently, a lot of hormone will be made and the organism will be tall. If the gene for that enzyme has an alternation that makes that enzyme less efficient, the amount of hormone will be less, the organism will be short. Thus genes control traits.
3.Alveoli of lungs are covered with capillaries for exchange of gases by diffusion process.
4.Function of kidney- (i) filtration of nitrogenous waste from blood. (ii) osmoregulation.
5.Mechanism of breathing- it consists of two steps (i) inspiration (ii) expiration steps of inspiration-a. contraction of diaphragm b. ribs move forward and outward c. volume of thoracic cavity as well as lungs cavity increases d air pressure inside lungs decrease e. air from out side move into lungs. Steps of expiration- a. relaxation of diaphragm b. ribs move downward and inward c. volume of thoracic cavity as well as lungs cavity decreases d. air pressure inside lungs increase e. carbon dioxide rich air comes out side.
6.Functioning of artificial kidney- see page 111 of text book.
7.Isotopes are unstable atoms due to the presence of more neutrons. So the atoms undergo disintegration. The time taken for 50% disintegration of radioactive carbon present in fossil is known. Calculating the percentage of radioactive carbon in fossil scientists are able to calculate age of a fossil.
8.Mutation-It is a sudden change in chromosome structure or number and that change is heritable. Cause (i) errors in DNA copying (ii) errors during separation of chromosome (iii) some chemicals or radiations effect- the effect may be beneficial or harmful or lethal.
9.Human body colour-Several genes and environmental factors are responsible for racial human body colour.
10.Errors in DNA copying during cell division brings variation which acts as raw material for evolution.

By S.Rath PGT Biology KV III BBSR

Pratyush said...

Q-How does chemical coordination takes place in plants?

Pratyush said...

Q-What is reflex action and how it is carried out in our body?

Pratyush said...

q-How did Mendel show that traits may be dominant or reccesive?

Pratyush said...

Q-What is speciation and how does it takes place?

Pratyush said...

Q- How does homologous organs provide evidences about evolution?

Sanket said...

Mam what is the importance of handwritting in the board exams?

I mean to say that it is quite difficult to maintain a fabolous handwritting when there is lack of time during the exams.

ranbir said...

q-please deferentiate between analogous & homologous organisms with proper examples .

suchismita said...

why evolution should not be equated with progress.?

suchismita said...

will geographical isolation be a major factor in the speciation of a self-pollinating plant species? why or why not?

suchismita said...

will geographical isolation be a major factor in the speciation of an organism that reproduces asexually? why or why not?

charan said...

q-what is chipko movement? How it benefit the local popultion?What is the advantage &disadvantage through this movement?please explain?
q- what is the difference between enzyme & hormone?
q-what is the largest endocrine &exocrine gland?
q-How pancrease is both an exocrine &endocrine gland?

prawn said...

What is artificial photosynthesis?
Give all necessary details.

How is cloning carried out?

prawn said...

What is in-vitro fertilisation?
What are test tube babies?
I need long and good answers.

prawn said...

What are allergies?
How do people get allergic to something.

shivraj rath said...

THE ANSWERS TO ABOVE QUESTIONS HAVE BEEN GIVEN IN THE BLOG. PLEASE SEARCH THE SITE OR REFER TO THE RESPECTIVE CHAPTERS FOR THE ANSWERS.

REQUEST: DO NOT WRITE ANY THING THAT DOES NOT RELATE TO THE CONTENT OF THE BLOG

shivraj rath said...

Importance of good handwriting in examination

Good handwriting always gives an upper hand to a student, but that doesn't mean that poor handwriting always costs. Actually what matters is writing neatly, make sure that examiner understands what you have written.
TIPS
1. Use Black pen to write title and subtitles.
2. Give diagrams wherever necessary.
3. Wherever possible use scale for writing.
4. Underline the key words.
5. Always start a new question on a new page.
6. If there is any mistake don't make it look shabby by scratching it many times; just put a line over it.
Follow the above points you’ll definitely earn 5 to 6 marks more than expected.

BIPLAB said...

Madam, can we use sketch pens while Doing diagrams?

rashmi said...

What is the differnce between involuntary action and reflex actions?

debleena said...

what are the functions of villi?

suchismita said...

Name the protein soluble in blood which helps in blood clotting.

According to some books the answers are- prothrombin as well as fibrinogen.

plz correct me mam..

sweta panda said...

its really a very helpful site

sweta panda said...

there is a question- which protein in blood hepls in clotting of blood?

i think the answer is -thromboplastin.
is the answer blood platelets?

suchismita said...

sorry...but the answer is not thromboplastin.

its either prothrombin or fibrinogen.

prerit jain said...

why there is not any electric field inside conductor?

shivraj rath said...


Get your answer here.

BIPLAB said...

Is pressure a scalar or a vector?

shivraj rath said...

Indeed a good question Biplab. Pressure is a scalar quantity, not a vector quantity. It has a magnitude but no direction associated with it. Pressure acts in all directions at a point inside a gas for example at the surface of a gas, the pressure force acts perpendicular to the surface.

Anonymous said...

Sir,can i have some points on the irony and satire used in the lesson.."the tiger king"(class XII English vistas text.chptr 2)

cbse123.co.cc said...

ANSWER
Satire- the crown prince’s drinking of milk of English cow; watching of English movie; learning English from an English man and being brought up by English nanny. A satire on The royals who could do anything to be like the English men).

Gifting of fifty diamond rings worth three lakh rupees to the British officer’s wife to retain the kingdom. (The royals during British period used to impose tax on their ‘Praja’ and punish them for any flimsy reason; but never hesitated to stoop low before the British master’s wife to be in their good book)

Irony- the king being killed by the wooden toy-tiger (death came not from a live tiger; but from a toy tiger –and his death was not a royal death by a tiger of indomitable courage ; it was a death by a toy hardly of worth two anna)

Operation was successful; but the king was killed (after operation by the famous surgeon it was expected the king to be alright; but he died- the famous surgeon’s operation brought death to the king).

aparna said...

what are the main differences betwwen regeneration and fragmentation?

Anonymous said...

what is the advantage of asexual reproduction over sexual reproduction?

Anonymous said...

could you please explain the process of transportation of food in plants?

CBSE123.CO.CC said...

ANSWER
---------------------------------
Regeneration:Specialized cells are involved which multiplies and differentiates into tissues which gives rise to an organism.
Fragmentation:No such specialized cell is involved. Each cell can multiply and give rise to an organism as the organism is made up of one kind of cells only.
----------------------------------
Advantage of asexual reproduction over sexual:
1.Fast process.
2.Retain all the parental characteristics without any variation.
3.Single parent is involved
----------------------------------
Find here: http://students-learn.blogspot.com/2007/12/revision-questions-for-cbse.html

shivam said...

ques:A simple pendulum consists of a 50 cm long string connected to a 100 g ball.the ball is pulled aside so that the string makes an anle of 37 degrees with the vertical and is then released.find the tension in the string when the bob is at its lowest position.

Anonymous said...

A train overtakes two persons who are walking at a speed of 2km/hr and 4km/hr respectively in the same direction in which the train is going, the train overtakes them in 9seconds and 10seconds respectively. Find the lenght and speed of the train.

Pravesh said...

Q- Do nitrogen have allotropes?
Ncert says no but the internet says yes

shivraj rath said...

Pravesh, NECRT is correct in writing that Nitrogen does not have any allotropes. However unstable allotropes N3 and N4 has been produced. So if question comes write about the unstable allotropes too.

Pravesh said...

Sir my teacher taught me & created Great Confusion about the chapter poets& panckes that;

1. Subbu was illiterate & a non brahmin

2. MRA was communist organisation

3. communist people had no feelings for their relatives and can kill family members without any hesitation

4. lawyer was a very logical person

Sir Please tell me which of the things are correct

Anonymous said...

In 9sec train covers 2km/hr x 9sec=5m.
In 10sec train covers 4km/hr x 10sec=11.1m.
So, the train travels at 11.1-5=6.1m/sec. (Do have a check for this answer)

shivraj rath said...

Pravesh Good Question:

But the answer to all your queries is 'No', only 3rd query will have an answer 'Yes'.

Anonymous said...

Sir internet Also Says about Alpha & Beta allotropes of nitrogen on extreme cooling do we have to mention that also

Pravesh said...

Sir,
In Poets & Pancakes the author says that mystery was solved

What was the conclusion?

vishal said...

how do germ cells make a single set of genes from the normal two copies that all other cells in body have?

CBSE123 said...

A normal cell has two set of chromosomes, germ cells are produced from the normal cell by reduction division(meiosis) in which the two sets of chromosomes are separated. That is how germ cells make single set of chromosome. Thanks for ques.

Anonymous said...

SIR,MY TUTION TEACHER SAID THAT VEGETARIANS ARE 1O TIMES MORE ENERGETIC THAN NON VEGIES BUT MY TEACHER SAYS IS NOY TRUE IT'S JUST THAT VEGIES HAVE A GOOD DIET. WHICH STATEMENT IS CORRECT?

08 February 2009 20:14

Pravesh (the Dragon...) said...

Sir,
In Poets & Pancakes the author says that mystery was solved

What was the conclusion?

MJ said...

Why do we say that activation energy cannot be zero? All the answers I have received till now direct me to the Arrhenius equation, saying that if Ea is zero, then rate will be equal to the collision factor A and as a result all collisions will lead to product formation.

But is this not compensated for by the collision theory which also takes into account the orientation? Thus even though the activation energy can be zero, the reaction would only proceed when the orientation is proper for both the reacting species.

I will wait for your opinion. Thank you!

BOOKWORM said...

why cant we consider evolution as a directional process?
if u think about the formation of new species and the nature's selection of a few out of them it all seems as if its directed to a particular point

bookworm said...

S STRAIN CAN KILL MICE.............
BUT R STRAIN CANNOT................
HOWEVER THE PROTEIN COAT IS NOT RESPONSIBLE FOR THE TRANSFORMATION ( ITS THE DNA )
THEN Y THE DIFFERENCE IN S AND R STRAIN???

JJ said...

Show that n squared +n+1 is not divisible by 5 for any n where n is a natural number

Mijaz said...

Do only the variations that confer an advantage makes an organism survive or evolution is irrespective of that?please explain. 5marks

Anonymous said...

it is said that mercury is a dense element almost denser than iron.then why is it liquid at room temp. also the density of a substance depends on the no. of atoms and mass of atoms in a particular area.and liquids have less no. of particles in a unit area. then what is the case with mercury which being denser is a liquid. according to its place in periodic table it should have much force of attraction between its particles.

shonali said...

If the direction of the current is towards the south ,then what would be the direction of magnetic field ,would it be from west-east or east-west

Anonymous said...

Write 2 advantages and 2 limitations of ICs?

anupam said...

what are principles of electric motor& electric generator?what is use of split rings ?

Anonymous said...

HYDROGEN COMPRISES OF METALLIC & NON METALLIC PROPERTIES, then why its a non metal ?

Anonymous said...

Mercury-mercury bonding is very weak because its valence electrons are not shared readily. (In fact mercury is the only metal that doesn't form diatomic molecules in the gas phase).

Anonymous said...

Laboratory tests have found that an electrical discharge causes the noble gases to combine with mercury vapor. These compounds are held together with van der Waals forces and result in Hg·Ne, Hg·Ar, Hg·Kr, and Hg·Xe as mostly Hg reacts as noble gasMercury is the only metal liquid at standard conditions for temperature and pressure, with a melting point of −38.83°C. Its boiling point of 356.73°C gives it one of the narrowest liquid ranges of any metal.

Mohammed Ajmal said...

Why is human sex ratio 1:1

Miziriya said...

hi can u give me one mark question for CBSE 10th for biology chapters alone.. with answers. If multiple choice it will be help for me.

CBSE123 said...

Miziriya, the questions have been provided on the right side bar of the site. Also MCQs are present over there. Use 1024X768 resolution for better view.

Anonymous said...

what is the cause of low blood pressure?

CBSE123 said...

Causes of low blood Pressure:
http://www.mayoclinic.com/health/low-blood-pressure/DS00590/METHOD=print&DSECTION=all

Manbir Singh said...

i like your service.

Manbir Singh said...

what do you mean by fermentation?

CBSE123 said...

Thanks Manbir: Here is the answer
Fermentation is an anaerobic process of decomposition of carbohydrate by some microbes like yeast producing Ethyl alcohol and carbon-dioxide. Ex:formation of dough while preparing bread,idli,dosa.

simranpreet said...

What are requirements for private candidates who is repeating 12 class?

Emily Bronte Fan said...

what is the definition of mutation

CBSE123 said...

Mutations are changes to the nucleotide sequence of the genetic material of an organism. Mutations can be caused by copying errors in the genetic material during cell division, by exposure to ultraviolet or ionizing radiation, chemical mutagens, or viruses.

anju said...

Q:Why is salt bridge not used in batteries?

Nupur said...

Why there is a symptom of photophobia in a person suffering frm disease chikungunya?

Nupur said...

why lower organisms reproduce sexually during unfavourable period?

Nupur said...

wht can we call parthenogenesis-sexual or asexual mode of reproduction? and why?

Nupur said...

why is liver palpable in a person suffering from Dengue Haemorrhagic Fever?

Anonymous said...

class12 English core -In the story The Rattrap who is Nils Olof? The rattrap peddler is mistook as Captain Von Stahle. then who is Nils Olof?

pavithra said...

The HOTS Question(English Medium)in SSC has been damaged,please check over it within a quick time.

CBSE123 said...

To download files right click the link and click 'save link as' and then press save button.

Aditi said...

What are the 3 types of phloem tissues in plants?

mandeepsingh94 said...

Q.What colour changes would you observe when methyl orange is mixed with an acid?

CBSE123 said...

Aditi,
There are two types of phloem tissues-Primary and Secondary. Secondary phloem grows during secondary growth.

suhail said...

whatare the four demerit of democracy

CBSE123.CO.CC said...

Demerits of Democracy:
1) The tyranny of the majority
2) Slow to act
3) Hard to maintain
4) Requires a lot of citizen participation

Anonymous said...

what are cocervates?

pavi said...

ANSWER THE FOLLOWING QUES
(1)which is the most electronegative
element in the periodic table
(2)which is the most electropositive element in the p.table
(3)how melting &boiling point differ down the group and across the period
(4)what is the difference between pH paper and universal indicator

CBSE123.CO.CC said...

1.Fluorine
2.Cesium
3.See book
4. http://in.answers.yahoo.com/question/index?qid=20070123012059AAZLwtt

Anonymous said...

distinguish between oxidation and combustion

pavi said...

Q.1.Briefly explain the circulation of blood in kidney
Q.2.how are reproduction and heredity interlinked
Q.3.How is small intestine designed to absorb digested food
Q.4.How is alveoli designed to maximize the exchange of gases
Q.5.Justify why the male reproductive system is called the ureinogenital system

hgfhgfhfghfghf said...

what are enzymes

mithun said...

will an electric bulb glow brigher or fainter in a parallel connection than series connection?

Ankush said...

Will agregate grade be given in cbse marksheet./...........plzzzzzz telll mmmmmmmmeeeeeeee

ஜெயந்தி நாராயணன் said...

do u have MCQs based on practicals for physics and chemistry also in this site

Saradha said...

Hello,

Kindly let me know the website which will enable me to get Q/A from the question bank for std IX & x [cbse] for Biology.

Thank you,
Saradha Sekhar.

Anonymous said...

more material for english core 12th

Anonymous said...

is there any reference guide for class 12th english

Anonymous said...

the cbse 12th ncert maths textbook is not opening please answer me fast

CBSE123 said...

CBSE-XII MATH TEXT BOOK

Try this link...
http://ncertbooks.prashanthellina.com/12_Mathematics.html

Anonymous said...

the cbse 11th maths book is not opening and i think there is an error please answer quick and i want exact life span of elephant ,rose ,dog ,banana tree,cow ,horse ,fruit fly ,rice plant ,banyan tree,parrot
is reading 11th cbse book is necessary for 12th or i just start 12th textbook and mbd
does the questions given at end of chapter comes in board exam
or reading extra questions are required

Anonymous said...

please provide me 11th ncert cbse book and notes on the chapter ofcbse 12th environmental issues and provide me questions on environmental issues asked in board exams only

CBSE123 said...

The ncert books are perfectly opening. Few recommendations: 1.Use latest browser (chrome)2.Scroll down to see chapterwise links 3. Right click the links and the click "save as" and save it to your hard disk.

For class XII boards reading class XII ncert books will be more than sufficient. First go through them thoroughly and then switch to reference books for extra questions.

meghasreeram said...

i am a 12th std student.my subjects are biology,chemistry,physics, informatics practices, English.....
i would like to write private maths exam.... i am intrested in bio chemical engineering...so maths is compulsory....
so can you please tell me the procedures for writting private maths exam???????

CBSE123 said...

@meghasreeram

If you have taken Mathematics in class XI, then you can take Maths as 6th Subject during the board exam form fill up.

Anonymous said...

my daughter was having state board in 11th and she secured 70 percent but now she is facing problem with state board syllabus and sanskrit and now she wants to take cbse in 12th as she was having cbse in 10th with 80 per cent she is aware of cbse syllabus and wants to take cbse she is ready with her studies only admission problem is coming and most of schools are saying no because of the state board in 11th avoiding her marks and knowledge so is there a rule that if a student is taking state board in 11th so the board cannot be transfered in 12th cbse please let me know it fast because there is much less time and also suggest some schools that can give her admission if the transfer of board is accepted because schools are starting from 26th june

Anonymous said...

Nice fill someone in on and this fill someone in on helped me alot in my college assignement. Say thank you you as your information.

Anonymous said...

i need answers related to vistas

CBSE123 said...

Get answers related to vistas here: http://students-learn.blogspot.com/2007/11/vista.html

avipsa said...

when the tRNA called sRNA?

avipsa said...

when is the tRNA called tRNA?

CBSE123 said...

@avipsa Other than in translation process tRNA is called sRNA.

Anonymous said...

please tell me how 2 score 100 in every subject?
is the syllabus and marks of 1st and 2nd term be different?
class 10....

ranveer said...

trignometry

cool blogger said...

Wat is the schedule for summative exam 1 for class 9?
If u know that Please tell it guys

Harshit Jain said...

its very good for students

anurag said...

thanks

Aditi said...

Can we two different color pens in cbse board exams ???

sam said...

hhhhhiiiiiiiiiiiiiiiiiii bbbbuuuudddddddddddiiiiiiiiiieeeessss

jaipal said...

i want to learn organic chemistry but i am not know more about organic chemistry.i am in 12th class....also time is very less(only two months)......please TELL.

Chitra said...

can you please upload a list of important essay topics for english?

Chitra said...

can you upload a list of important essay topics for english?

Anonymous said...

plz..... tell me some MCQ'S
1.) normal temperature of human body
a)90F (b)98F (C)98.4F (D)96.4F

2.)the blood pressure is the pressure in
a)arteries b)veins c)auricles d)ventricles

3.)total no. of bones in human skull is
a)8 b)12 c)30 d)32

4.)what is funny bone
a)a muscle b)a nerve c)a bone
d)a blood vessel

5.)a normal blood pressure in human body is
a)90/60 c)160/120
c)120/80 d)140/100

Anonymous said...

plz..... tell me some MCQ'S
1.) normal temperature of human body
a)90F (b)98F (C)98.4F (D)96.4F

2.)the blood pressure is the pressure in
a)arteries b)veins c)auricles d)ventricles

3.)total no. of bones in human skull is
a)8 b)12 c)30 d)32

4.)what is funny bone
a)a muscle b)a nerve c)a bone
d)a blood vessel

5.)a normal blood pressure in human body is
a)90/60 c)160/120
c)120/80 d)140/100

sangeeta said...

I AM UNABLE TO LEARN HISTORY FOR CLASS XII BOARD. PL TELL ME IMPORTANT QUESTIONS AND CHAPTERWISE WEIGTHAGE

sangeeta said...

please tell important questions for history for class xii. I am unable to prepare. pl help me.

bimal said...

q-give me a short summary of poem ''a roadside stand''

shefali said...

how can V define polygeny, euploidy?

shefali said...

what are retroviruses?

shefali said...

what are the number of chromosomes of garden pea?

Ayush said...

what is a oxidation number

sushmi said...

what is cross breeding

sushmi said...
This comment has been removed by the author.
ittharangam said...

Please add revision notes of plus one biology,chemistry and of plus two science subjects

Pragzz said...

Its seriously Dumb .....!! no use of it ...<3

Anonymous said...

How can I download the ppt? I like it.

Valencia said...

How can I download the ppt? I really liked it.

Valencia said...

Thanks a ton! I got to download it.

READY FOR EXAMS said...

can u send me a link of solution ebook for the NCERT book CLASS IX
please send it to
kushashwaravishrimali@gmail.com

ANKESH KUMAR SINGH said...

q- what is heptal portal system?

ANKESH KUMAR SINGH said...

q- what is heptal portal system?

Anonymous said...

how to prepare for physics xii board exam?

Anonymous said...

hw to prepare for physics xii board exam?

goku rana said...

how an earthquake formed.

goku rana said...

how are earthquake formed.

Anonymous said...

can i get class 7 answers sheet !!

Anonymous said...

science notes of all chapters of class viii

BM said...

FIND THE TOTAL NUMBERS OF WAYS IN WHICH SIGN'+' CAN BE ARRANGED IN A LINE SUCH THAT NO TWO '-' SIGN OCCUR TOGETHER

isma t said...

english core for class xi and xii- 2012,2013 will get conventional questions or multiple choice question in the new pattern of cl x

ayush said...

nic

akanksha dixit said...

is cbse exams r preponed????
plz rply soon.....

Samdarsh said...

Is there an intersection of time and space in the story "The Third Level" from Vistas?

Saad Amir said...

In getting education the student face many problems in acquiring education.Student has get his destination point easily.
Thanks...
regards, saad from
Education

Anonymous said...

WHAT IS THE PUREST FORM OF WATER?

ashlin said...

how to find out the direction of induced current if a bar magnet facing south pole is brought in the side of the coil?

Mukesh said...

about garghoritian family

Utkarsh said...

thnx

Utkarsh said...

thnx

CHIRANJIT CHAKRABORTY said...

Can you please upload the best summery of the poem A Thing of Beauty by John Keats

Anonymous said...

In 'third level' what does he mean by saying that the grand central subway HAS BEEN an exit for many of the people.....

deepu said...

plz answer the ques .,,,justify the title "lost spring"?

aritra mitra mitra said...

ques- (P+a/v^2)(b-v)=RT
P=Pressure,v=velocity.T=kelvin unit of temperature. find the dimensions of a and b.

i want the solution step by step...it is given in my book but i cannot understand the process as they didnot show any steps.

dipesh suthar said...

State the order in which the claims against a firm under dissolution are settled.
please answer regarding to the syllabus of class 12

Rajkumar Singh said...

This discussion is really very nice and very informative. Now do not have any doubt.

Top Mat Colleges in Delhi

Surender kaur said...

please answer the query that abot the mclerry character in evans tries an o level

Karan said...

great site

Karan said...

great site

kavita yadav said...

Q.why does charley say"he certainly can't go back to his old business?

Nish Addi said...

will cbse give grace mrks in physics Class 12?? If yes than how many marks.. plz reply soon

deepak jangra said...

TISSUES IN PLANTS

Kindly tell me the tissue in plants where they are present with a diagram.
And is a plant consists of both
types of tissue i.e.
Meristematic and Permanent Tissue.

deepak jangra said...


TISSUES

Kindly tell me where tissue are present in plants.

can a tissue consists of both types of plant tissue i. e. Meristematic and The Permanent Tissue.

deepak jangra said...

TISSUES

Kindly tell me where tissue are present in plants.

can a tissue consists of both types of plant tissue i. e. Meristematic and The Permanent Tissue.

deepak jangra said...


CONCENTRATION OF A SOLUTION.


QUES - To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water
at 293 K. Find its concentration at this temperature.


By which formula i have to solve it.

amount of solute/am. of solvent.

or am. of solute/am. of solution.


I AM SO AND SO CONFUSED, BECAUSE BOTH FORMULAS GIVE DIFFERENT ANSWER.

KINDLY HELP ME TO SHOT OUT IT.

Suraj said...

Explain: "A thing of beauty is a joy forever".

Shruti Sinha said...

GOING PLACES-FLAMINGO
Pg-78-
Q. "Huh-if you ever come into money...if you ever come into money you'll buy us a blessed decent house to live in,thankyou very much."
-There's a pause in this statement made by Sophie's father represented by the "..." -why so? whats the inner meaning?

Q. 2nd Para from Below...
"Sophie watched her back stooped over the sink and wondered at the incongruity of the delicate bow which fastened her apron strings. The delicate-seeming bow and the crooked back."
=What is the inner meaning of this line? What's the whole incongruity about? Why's the expression "delicate-seeming" has been used? Is it weighing down on her? A representative of the responsibilities of a lower middle class woman?

Q.Does she really meet Danny Casey or is it just a figment of her imagination?

Q.Whats the whole mental conflict in her mind on Page 84?

Anisha desai said...

63945692

maggie.danhakl@healthline.com said...

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gokul nampoothiri said...

good

shikha said...

what is the difference between home board and the other board..that normal cbse one??

Pankaj Sharma said...

how to solve questions on kirchoff laws in chapter 2 of physics of +2 ?