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The water borne diseases are spread by water when an unhealthy person remove his facel waste in water his bacteria mixed with water and transported if any one come in his contact or by drink that water then he also unhealthy

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Why an insect pond sactter is able to walk on water?explain.

Posted by Raj Patel 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Raj Patel 7 years, 1 month ago

Shabeer can u give any more reason

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Shabeer Fazil Mj 7 years, 1 month ago

Because when it spreads its legs over the water it tries to reduce its density per sq.m. so it's density is lower than water therefore it can easily float on water failing to sink. If u find this answer helpful ,it's my warm welcome???

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What is meant by osmasis

Posted by Sree Jith 7 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Raj Patel 7 years, 1 month ago

The process of movment of substances from a region of higher concentration to a region of lower concentration across the sami permeable membrane.

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Niharika Semwal 7 years, 1 month ago

A spontaneous movement of particles from higher to lower concentration

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Sk Kumar 7 years, 1 month ago

The movement of water from higher concentration to lower concentration through a selectively permeable membrane called osmosis

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For any subject why does the temperature remain constant during the change of state

Posted by Lohit Tripathy 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Krishan Kumar Yadav 7 years, 1 month ago

Because the enery given to the subject is used to Break the force of attration of the subject

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Sk Kumar 7 years, 1 month ago

The temperature gets used up in the form of latent heat during the change of state

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Make a mind map of infectious agents with examples : sleeping sickness, aids, SARS, kala-azar,acne, polio, jaundice, hepatities, pneumonia, common cold

Posted by Anushiya Janaki Raman 7 years, 1 month ago

CBSE > Class 09 > Science

0 answers

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Difference between prokyeriotix and ekyefiotic cell

Posted by Niharika Semwal 5 years, 11 months ago

CBSE > Class 09 > Science

3 answers

?? Mr. Jai Prakash Acharya 7 years, 1 month ago

Riya is true

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Riya Sharma 7 years, 1 month ago

Please first correct your spellings

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Niharika Semwal 7 years, 1 month ago

Prokaryotic cell has not well defined cell called nucleus and equaryotic has nucleous

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Difference between prokaryotic and eukaryotic cells

Posted by Saurav Yadav 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Prajjwal Upadhyay 7 years, 1 month ago

Prokaryotic Cell * Size - ( 1-10 micron meter ) * Nuclear region is naked and primitive * Chromosome : Single * Membrane - bound cell organelles absent. Eaukaryotic Cell * Size - ( 5- 100 micron meter ) * Nuclear region is well developed and surrounded by nuclear membrane * Chromosome : More than one * Membrane - bound cell organelles present

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Anabena

Posted by Indersingh Dahiya 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Sree Jith 7 years, 1 month ago

Giving milk to ther young once

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Dollsi Jain 7 years, 1 month ago

it is the other name of blue green algae

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If the refractive index of diamond is 2.4 find the velocity of light in diamond (c=3*10 8 m/s)

Posted by Prabhas Yadav 7 years, 1 month ago

CBSE > Class 09 > Science

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A bus starting from rest moves with a uniform acceleration of 0.1m/s for 2 minutes rhen find speed acqiured and distance travelled

Posted by Chhagan Choudhari 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Amit Chaudhary 7 years, 1 month ago

12m/s and 720m

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Sk Kumar 7 years, 1 month ago

Speed= 12m/s Distance= 720m

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why lysosomes are known as suicide bag?

Posted by Ishu Budhwal 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Niharika Semwal 7 years, 1 month ago

Because they destroy damage cell

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Yogita Ingle 7 years, 1 month ago

Lysosomes are cellular organelles that contain digestive enzymes that break down waste materials, foreign material and cellular debris. Lysosomes are capable of digesting nucleic acid, polysaccharides, fats, and proteins. Along with them lysosomes also digest or damage its own cells by its own enzymes, which lead to cell death. This process is called as autolysis. Hence lysosomes are also called as suicide bags

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What is the cell wall of fungi made up of

Posted by Payal Patidar 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Jia Gupta 7 years, 1 month ago

The cell wall of fungi is made up of Chitin which is a type of carbohydrate containing nitrogen.

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Give name of all elements

Posted by Ritesh Yadav 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Sanju Devi 7 years, 1 month ago

For this you have to purchase periodic table which is best

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For the prevention of infectious deases some public health program of childhood immunization are connected in the country

Posted by Amit K 7 years, 1 month ago

CBSE > Class 09 > Science

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What is solid ice?

Posted by Dushyant Rajput 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Meghna Thapar 6 years, 1 month ago

Dry Ice is the common name for solid carbon dioxide (CO₂). It gets this name because it does not melt into a liquid when heated; instead, it changes directly into a gas (a process known as sublimation).

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Sponge is solid?

Posted by Mridul Chaubey 7 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Niharika Semwal 7 years, 1 month ago

Yes because when the energy is not applied it is a solid

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Sanju Devi 7 years, 1 month ago

Yaa

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Aanchal * 7 years, 1 month ago

Yes but it have pores

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Muscles drawing and labelling differences

Posted by Tushar Rathi 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Om Kumar 7 years, 1 month ago

Science ka sample paper with answer

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Define dry ice . Theoretically.

Posted by Khushi Rani 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Yogita Ingle 7 years, 1 month ago

Dry ice is the common name for the solid form of carbon dioxide. It 's called dry ice because it doesn't melt into a wet liquid. Dry ice sublimates, which means it goes from its solid form directly to its gaseous form.

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Ramesh Kumar 7 years, 1 month ago

Solid carbon dioxide(CO2) is termed as dry ice.

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What is endoderm

Posted by Rashad Ahamed 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 7 years, 1 month ago

Endoderm-- It is the innermost layer of the embryo which differentiates to form structures of digestive and respiratory system,urinary bladder and the middle part of the ear.

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Difference between scalar quantity and vector quantity.

Posted by Nishant Prajapati 7 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Yogita Ingle 7 years, 1 month ago

Scalar	Vector
It has only magnitude	It has direction and magnitude
Only one dimensional	It is multi dimensional
This quantity changes with the change in magnitude	This changes with magnitude and direction
Normal rules of algebra are applicable here	There is different set of rules known as vector algebra
One scalar quantity can divide another scalar	One vector cannot divide another vector
In example of speed, time etc, the distance between the points is scalar quantity not the direction	Velocity could be an example because it is measurement of the rate of change of an object’s position

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Khushi Rani 7 years, 1 month ago

Scalar has only magnitude . Ex distance . Vector has both magnitude and direction . Ex displacement. Scalar and vector depends upon these both factors.

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Shams Un Nahar Khan 7 years, 1 month ago

Scalar quantity has only magnitude and no direction while vector quantity has magnitude as well as direction.

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When a plant a immediately placed in a hypertonic solutionbit burst or not ? Why or why not

Posted by Ramesh Goswami 7 years, 1 month ago

CBSE > Class 09 > Science