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1101.

Fastening of seat belts is advised for the safety of persons sitting in a moving car. Give reason.

Answer»
1102.

Cell organelle

Answer»
1103.

What do you mean by osmosis

Answer» In osmosis water moves from higher concentration to lower concentration through semi permeable membrane :-)
Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration
Water also obeys the law of diffusion. The movement of water molecules through a selectively permeable membrane is called osmosis.
1104.

10 reasoning question from physics from motion\xa0

Answer»
1105.

Properties of solid, liquid and gas

Answer»
1106.

Do ribosomes have membrane

Answer» No
1107.

Difference between prokaryotic cells and eukaryotic cell

Answer» Cell with a developed nucleus is known as Prokaryotic cell
Prokaryotic cellsThey are generally small in size.Nuclear region not well definedSingle chromosomeMembrane bound cell organalles absentEukaryotic cellsGenerally large in sizeWell defined nuclear region More than one chromosomeMembrane bound cell organalles are present
1108.

What is the effect of temperature on humidity

Answer»
1109.

What do you understand by instantaneous velocity

Answer»
1110.

Derivation of second law of motion

Answer»
1111.

why do we keep ether and acetone at cool place

Answer» B\'coz at room temperature acetone, which is a liquid will convert into gas. To prevent this from happening we keep acetone at cool place
1112.

What will happen if we put onion peel in concentraded sugar solution for 15-20

Answer»
1113.

Activity 8.3 science motion chapter

Answer» ans
1114.

What is chordata? Explain

Answer»
1115.

What is the diference between evaporation and vapourisation

Answer» Vapourisation is a bulk phenomenon while it is a surface phenomenon
Vaporization is a transitional phase of an element or compound from a solid phase or liquid phase to a gas phase while evaporation is a type of vaporization wherein the transition from a liquid phase to a gas phase takes place below the boiling temperature at a given pressure, and it occurs on the surface.
1116.

What is cell organalle ?give some examples.

Answer» The component of cell that flot on the surface of the cytoplasm present in the cell is known as cell organelles.For example: mitochondria,golgi bodies,etc.
Components present in a cell.eg, mitochondria
1117.

Why vacoules are called storage sacs

Answer» Vacoules are called storage sacs because they contain necessary nutrients which are helpful to plant and they can even store waste material to protect the cell from contamination
1118.

Functions of vaculoe in cell

Answer» They provide turgidity and rigidity to the cell.They are the storage sacs of the cells
1119.

Chapter 8 motion

Answer»
1120.

Does it contain water in hump of a camel ? or not?

Answer» No it consists of fat which is stored in them to use when they is less stortage of food and watet
1121.

What is the difference between speed and avarege speed?

Answer» The distance tracelled by any object in per unit time is called speed
Speed in general terms is distance divided by time. Speed sometimes may mean instantaneous speed also.Example: the speed shown in the speedometer is actually the instantaneous speed of the vehicle.Average speed is equal to total distance divided by total time.\xa0
1122.

Why mitochondria is called power house of cell

Answer» Mitochondria is called the powerhouse of the cell beca7se it oxidize food and provide energy to living organismMitochondria have their own DNA and Ribosomes
Because it makes food for the other cell
Mitochondria is called power house of cell because it helps in energy ,atp formation and performs cellular respiration
Mitcondria is called power house of the cell because it produce enerrgy in the form of ATP
1123.

Why the foot of a man is injured when he hits a stone?

Answer»
1124.

Where is the function of epidermal cell

Answer» Epidermal cells on the aerial parts of the plant often secrete a waxy, water-resistant layer on their outer surface. This aids in protection against loss of water, mechanical injury and invasion by parasitic fungi. Since it has a protective role to play, cells of epidermal tissue form a continuous layer without intercellular spaces. Most epidermal cells are relatively flat. Often their outer and side walls are thicker than the inner wall.
1125.

Is smell of garlic a matter ?why or why not

Answer» Yes smell of anything is a matter because of presence of some volatile substance in the air. So ans is yes
Smell of garlic is not a matter because characteristics of matter is that the matter have volume or mass and felt by our sense organs. Smell of garlic do not have volume or mass. So this prove that smell of garlic is not a matter
No
1126.

How are sol, solution and suspension different from each other

Answer» \tSol(Colloidal solution)SolutionSuspension1.They are heterogeneous in nature1.They are homogeneous in nature1.They are heterogeneous in nature2. They scatter a beam of light and hence show Tyndall effect.2. They do not scatter a beam of light and hence do not show Tyndall effect.2. They do not scatter a beam of light and hence do not show Tyndall effect.3. They are quite stable3. They are very stable3. They are unstable4. Examples of sol are: milk, blood smoke etc.4. Examples of solution are: salt in water, sugar in water.4. Examples of suspension are: sand in water, dusty air\t
1127.

What is rad data book??

Answer» It keeps the record of all endangered animals.
Record of Endangered Animals
1128.

What is the velacity

Answer» Distance travelled by an object in per unit time in given direction.
Displacement travelled by an object per unit time is called velocity
First you correct your spelling of velocity Ans.The rate of change of displacement with respect to time is called velocity
It is the rate change of displacement
It is velocity So velocity is the displacement of a body per unit time .it is a vector quantity
1129.

Which part of cell helps in detoxification

Answer» SER is the right answer
Smooth endoplasmic reticulum helps part of cell in detoxification understood
Yes smooth endoplasmic reticulum
Smooth endiplasmic reticulum
SER
1130.

Polynomials

Answer» Say question about polinomials
What polynomial
1131.

Difference between muscle and nerve tissue

Answer» Muscle tissue\xa0is an excitable tissue that generates force leading to voluntary and involuntary movements of the body. Muscle tissue is divided into three types based on location and function: skeletal, cardiac, and smooth. The three types have cellular differences that are important for carrying out their distinct functions. Skeletal muscle is attached to bones and skin.Nervous tissue\xa0is excitable tissue that transmits electrical and chemical signals throughout the body by means of specialized cells called\xa0neurons. This tissue makes up the brain, spinal cord, and all of the nerves. A\xa0neuron\xa0is a cell in the nervous tissue that transmits electrical and chemical signals throughout the body.
1132.

Application level questions based on inertia for class 9

Answer»
1133.

Genes are hereditary units and they are represent various segments of DNA it is true.

Answer» Its true
Or false
1134.

What is mixuture and it\'s types in short

Answer» Mixture is a substance that which mix many things in only one element.
1135.

In which state fire exist?

Answer»
1136.

Explain how a rocket works (based on the 3rd law of motion).?

Answer» The fire of rocket make force on earth and earth will also exert force to the rocket in upward direction.
1137.

What is a solute

Answer» In which we mix something like lemon juice?️, lemon is a solvent and water is solute ??
1138.

What is eq

Answer»
1139.

In science what is more important

Answer» Whole science is important
1140.

Difference between self polination and cross polination?

Answer» Self pollination : from anther to stigma of the same flower, or to another flower of the same plant. Cross pollination : transfer of pollen from the anther of a flower to the stigma of a flower on a different plant of the same species.
Mera ans. kyu nhi milta
1141.

What is polination?

Answer» Pollination is a method where pollen grains are picked from an anther, which is the male part of a flower and transferred to the flower’s female part called as a stigma. To make the pollination work successfully, the pollen grains must be transferred from the same species of flower.
1142.

Difference between solid,liquid and gases

Answer» Solid1) solid have definite shape and size.2) solid can\'t flow3) solid is not compressible.Liquid 1) liquid have indefinite shape.2)liquid can flow.3)liquid is also not compressible.
1143.

What are ncert boob of science

Answer» Acid is a substance which give hydrogen lions on dissolving in water.they turn blue lotus to red.
What is acid
1144.

What is defusion

Answer» The spontaneous movement of gaseous substances from a region of high concentration to the area of lower concentration.
Diffusion means intermixing of molecules
1145.

What happens to the force between two object if the masses of both object are doubled

Answer» Force is inversely proportional to distance between the objects.So if the distance between the two objects is doubled then the gravitational force between them is reduced to 1/4 of its original value
1146.

A body moving with 10m/s comes to rest in 2 seconds. Find retardation.

Answer» -5m/s^2
-5m/sec sq.
1147.

What do you mean by sperm and ovum and how it produced?

Answer» The sperm cells are with man in the body inside and the ovum cells are with females. The sperm and ovum produced when male and female do sexual reproduction.
1148.

Liquids generally have lower density than solids why so?

Answer» Because their is less force of attraction between particles of water. They are also loosely packed.
Because of their intermolecular space
The atoms are loosely packed.
1149.

What is a power bank of a cell called?

Answer» Mitochondria
ATP generating \'mitichondria\'
Mitochondria
Mitochondria is called power of cell
Mitochondria
Mitochondria
1150.

¥*¥ = ?

Answer» ¥power 2
???