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64501.

What is the full form of hiv

Answer» Human immunodeficiency virus
Human immunodeficiency virus
64502.

Which instrument will take to measure the BP

Answer» Sphygnomanometer
Sphygmomanometer
Sphygmomanometer
64503.

Who gives the modern periodic law

Answer» Modern periodic law was given by Neil\'s bohr
Mandeeleve
64504.

Function of aorta

Answer» The aorta is the largest artery in the body. The aorta begins at the top of the left ventricle, the heart\'s muscular pumping chamber. The heart pumps blood from the left ventricle into the aorta through the aortic valve. Three leaflets on the aortic valve open and close with each heartbeat to allow one-way flow of blood??????
Blood receiving chamber
64505.

Platinum, gold, silver are used to make jewellery. Give reason

Answer» Beacause they are nobel metals which do not react with present environment and water .and its beuty remains constant for a long time .
Because they are less reactive in nature
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64506.

Isomers and nomenclature for practice

Answer» It is a part of a carbon and compounds and yes it\'s very much important for CBSE board exam
What is that?
Yes , very much important
64507.

What is the nutritional value of esters

Answer»
64508.

Why molecular movement is absent in virus when it is outside the host cell

Answer»
64509.

Write the equation of photosynthesis

Answer» rcv
Co2 + 6H2o =C6 H12 O6 + 6O2
64510.

Write a short note on nervous system of animale

Answer» Its same as humans
Animals have no nervous system Only human being have nervous system
64511.

Write a short note on refinning of crude metals

Answer»
64512.

What is different blw saop abd Detergen

Answer» soaps clean well in soft water.Detergents clean well in soft and hard water both.soaps are sodium salt of carboxylic acids Detergents are sulphide salt of carboxylic acids sops cant clean as well as detergents.Detergents clean more better than soaps.soaps are biodegradable detergents are non biodegradable
64513.

what is the relationship between focal lenght and magnification

Answer» Fs
64514.

How can we know that which has is been collected on cathode and which on anode..??

Answer» Ions of metals or cations are collected on cation and ions of non metals or anions are collected on anion as opposite charges attract eachother
64515.

How does rhizopus multiply by spores ?

Answer» Rhizopus was present in atmosphere and when the bread come in contact of moisture rhizopus develop a thread like structure and start reproduction . When spore form then it multiplies
64516.

Advantages and disadvantages of*Conventional , and*Nonconventional sources of energy

Answer»
64517.

what are non-biodegradable substance

Answer» Those substance which do not decompose or decayed by the action of microorganism is known as non biodegradable substance
Those substance which are not eco friendly
The substances which can not be broken into simplest form
64518.

How does the reproduction process can be classified on the basis of germ cells involved

Answer» A germ cell is any biological cell that gives rise to the gametes of an organism that reproduces sexually. In many animals, the germ cells originate in the primitive streak and migrate via the gut of an embryo to the developing gonads. There, they undergo meiosis, followed by cellular differentiationinto mature gametes, either eggs or sperm. Unlike animals, plants do not have germ cells designated in early development. Instead, germ cells can arise from somatic cells in the adult (such as the floral meristem of flowering plants.
64519.

Find the power of concave lens of focal length 2 metre

Answer» F=-2m(concave lens)P=1/F 1/-2=-0.5D
We have P=1/f so power of concave lens is -1/2 or 0.5 dioptre
64520.

Why variation important for a species

Answer» Variation makes the chances of survival in daily changing environment.
Variation is important for adoptation
For combating with the environmental changes
64521.

Suggest a method to find approximate focal length of a concave mirror

Answer»
64522.

What is tetra valence?

Answer» Those atoms in which the valence are 4 is known as tetravalence. e.g. Carbon,silicon,etc.
The atom which has 4 electron in the outermost shell
64523.

Why electrical impulse changes into chemical impulse when passes through synapse

Answer» Because in synapse a chemical substance is released which change it into chemical impulse.
There is a liquid present in a synapticnob is commonly nown as acetylcoline which convert electri impulse into chemical impulse
64524.

Identify the nature of mirror and mention two characteristics of image formed when magnification m=6

Answer»
64525.

What is the difference between fission and fragmentation

Answer» \tFissionFragmentation1) The body parts break down into unequal parts by external forces. The broken parts may develop into new organisms.1) Fission is a process of equal division of prokaryotic cells into equal parts. Here the DNA strands are equally divided into two daughter cells.2) The process may or may not be deliberate2) This process is deliberately done by an organism\t
64526.

Give examples of decomposition reaction

Answer» When silver chloride decomposes then it form silver and chloride
64527.

The tilt of the earth\'s axis cause cold weather. How

Answer»
64528.

What is the electron dot structure of carbondioxide

Answer» O double bond C double bond O
64529.

Find the weight of an object at the centre of the planet whose radius is R and mass is M

Answer»
64530.

Why testes are lie in ******* not in the abdominal cavity

Answer» To provide specific temperature
64531.

What is the working of pineal gland in our body

Answer» Pineal gland produce melatonin which help in modulation of wake/sleep pattern .it is an endocrine gland
64532.

How many types of charge

Answer» There are three types of charges one negative another positive and another neutral
Positive and negative
There are two types of charge negative and positive
64533.

Describe me DC generator

Answer» Aur kya nhi aa rha hai science me please tell me
Nhi aa rha hai kya
Kisne kha
Direct current generator
Waise bhi yeh board syllabus main nahi hai yaar
64534.

Which gland is responsible for heart beats and blood pressure

Answer» Adrenal gland
Adrenal gland
Adrenal glands
64535.

What is BOWMAN\'s capsule

Answer» The nephron has a cup-shaped bag at its upper ends which is called bowman\'s capsule
64536.

Volt =20 R=13 find current

Answer» I(current) is appx. 1.5 ampere
V=20,R=13 by ohms law I=1.5
As v is equal to I R therefore I is 1.538
64537.

An object .

Answer»
64538.

Where the electrical impulse formed?

Answer» Nervous in synapse
Axon
In cell body
64539.

Define parthanogenouse.

Answer»
64540.

What is ville?

Answer» Villi are small finger like projections which lie on the surface of small intestine. it absorb water
Ville are the hair like structures on the cells of ileum and jehjnum of small intestine
64541.

What are isotopes???

Answer» Isotopes are the same elements of same atomic number but different mass number
64542.

What is anodic protection

Answer» Anodic protection (AP) is a technique to control the corrosion of a metal surface by making it the anode of an electrochemical cell > and controlling the electrode potential in a zone where the metal is passive .Anodic protection is used to protect metals that exhibit passivation in environments whereby the current density in the freely corroding state is significantly higher than the current density in the passive state over a wide range of potentials.
64543.

What is renal failure and which technology is used for survival

Answer» Dialysis process is used for the the purification of blood when the renal failure occurs means kidney stop doing its work.
64544.

Rules and concepts of modern periodic table...

Answer» Atomicnumber ,physicalproperty ,chemicalproperty
Atomic number
64545.

How many types of nervous system are? Define its functions

Answer» Two types of nervous systen CNS and PNS
64546.

What is the receptor of taste, light, smell, sound and heat?

Answer» Thermo receptors are the receptor for heat
Olfactory receptors are the receptors for smell
Phono receptors are the receptors for light
Gustatory receptors are the receptors for taste
64547.

Define endoplasmic rediticulam

Answer» The endoplasmic reticulum (ER) is a large network of membrane-bound tubes and sheets. It looks like long tubules or round. There are two types of ER– rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER). RER looks rough under a microscope because it has particles called ribosomes attached to its surface. The ribosomes, which are present in all active cells, are the sites of protein manufacture. The manufactured proteins are then sent to various places in the cell depending on need, using the ER. The SER helps in the manufacture of fat molecules, or lipids, important for cell function.
64548.

what ismade alkene

Answer» Aqueous solutions of base
64549.

Do There anything whose velocity is more than the velocity of light?

Answer» No
64550.

Define atomicnumber and massnumber?

Answer» Atomic number of any element contains only its no. of protons whareas mass number of any element is the sum of its protons and nuetrons....