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67151.

Auxin mean

Answer» Auxin is plant hormone which helps in the growth os the shoots.
Auxin is growth hormone in plants ok bro
67152.

Solid sodium bicarbonate was placed on a strip of PH paper what was the change in colour

Answer» Blue
67153.

Mention the mode of reproduction in amoeba

Answer» Binary or multiple fission
Asexual mode of reproduction
binary fission
67154.

Mention how organisms like bread moulds and mushrooms obtain their food

Answer» Why dead & decayed matter n
They take food by metabolizing non living organic mattrt
67155.

What is mean by 10percent law

Answer» if a plant consume enregy of 10000J and the deer eats the plant the deer will have energy of 1000J and if the lion eats it he will get energy of 100J Plant------------ deer -------------lion10000J----------1000J---------------100Joule
10percent law state that only ten percent energy is transfer from one tropic level to another
67156.

What is exothermic.

Answer» In which reaction in every evolent these are in reaction exothermic reaction
Reaction in which heat is released along with the formation of product is known as exothermic reaction
67157.

what is the role of atmospheric refraction in advance sunrise and delayed sunset?

Answer» Advanced sunrise and delayed sunset The sunrise is advanced due to atmospheric refraction of sunlight. ... This happens due to a gradual variation in the refractive index of the atmosphere. For the observer on the earth, the apparent position of the sun is slightly higher than the actual position.
67158.

Name the liquid that contain sperms

Answer» Semen
semen and it is the causes of thick sperm
Semen is the liquid which contains sperm
Semin
67159.

What happen ethanoic react with Na metal ?

Answer» The reaction of ethanoic acid with sodium metal results in the formation of sodium ethanoate or commonly known as sodium acetate and hydrogen gas is liberated . The reaction is represented as -2CH3COOH + 2Na → 2CH3COONa + H2
67160.

List three source of magnetic fields

Answer» Electric current
67161.

How can balance chemical eq

Answer» By hit n trail method
67162.

How to draw a diagram of brai

Answer» Learn all the part brain
67163.

Science NCERT page no.221Q.no.7 me resistance nikalne ke liye V aur I ki value kaun si lenge ???

Answer» But there is only one answer of this question
There will be 5 cases in which you have to take the value given. Like:- Case1 V=1.6 & I=0.5Case2 V=3.4 & I=1.0
67164.

Why does a Ray falling normally on the plane mirror retrace its path.

Answer» What is meant by retrace its path
angle I = angle Rwhen a ray falls normally on the mirror , angle I = 0°\xa0therefore, angle R is also 0° and it is reflected on same angle or RETRACES ITS PATH.
Because it is reflected by the plane surface of the mirror
67165.

What you mean by hormone?

Answer» \tCells cannot continuously create and transmit impulse, the cells need some time to reset the mechanism before these can create and generate a new impulse.\tDue the limitations, instead of generating electrical impulse, the stimulated cells release a chemical compound called hormones.\tHormones will diffuse to all the cells of the body and the cells have receptors to detect the hormones and to receive the information and transmit it.\tHormones are the chemical messengers which are secreted by the endocrine gland into the blood.
It is the secretion of chemical in our body.Which help in change in our body.
67166.

Give an example of photo & electro decomposition reaction

Answer» Electrolytic decomposition:Decomposition of any molecule by using electricity is termed as electrolytic decomposition.Fr example: 2H2O→ 2H2 + O2...... Photo decomposition reaction means decomposition of and substance in the presence of sun light For example 2AgCl → 2Ag + Cl2 ..........
Electro decomposition - electrolysis of NaCl
67167.

What is C4H8O2 ?

Answer» Butanoic acid.
Ethyl acetate is C4H8O2 . it is an organic compound
67168.

Why sky aapears to be blue?

Answer» Sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.
it is the phenoma of scrattring of light . Read pg 195 of NCERT for moree info
Due to refraction of sunlight....
67169.

What do you mean by byogene ages

Answer» No it is in chemistry
Biogenesis is the production of new organisms or organelles.
67170.

What is caustic acid

Answer» Caustic Soda or sodium hydroxide is formed when electricity is passed through aqueous solution of brine
Sodium hydroxide (NaOH)
Maybe its caustic soda formulated asNaOH
NaOH
Sodium hydroxide
67171.

What is crude oil

Answer» The unrefined oil which are obtained from oil mine is known as crude oil..
67172.

Name type of different salts

Answer» 1)Acidic salts eg - NH4Cl (NH4OH + HCl) 2) Basic salts eg - CH3COONa (NaOH + CH3COOH)3) Neutral salts eg- NaCl (NaOH + HCl)
I mean classification
67173.

State function of veins and pulmonary veins

Answer» Veins carry deoxygenated blood except pulmonary vein
Veins deliver deoxygenated blood to your heart, the pulmonary veins carry oxygenated blood to your heart. ................ Hope it will help yu ?
Both have different functions Veins- transport deoxygenated blood from body parts to heart.While pulmonary veins- transport oxygenated blood from lungs to heart...Hope you understand...
67174.

Lens formula vs mirror formula

Answer» Mirror formula : l / f = 1/v + 1/uLens formula : 1/f = 1 / v - 1 / u
In lens formula, u have 1/f = 1/v-1/u. But in mirror formula u have 1/f=1/v+1/u
67175.

If molecular formula is given,how to identify its structural formula?

Answer» First write its condense formula and then easily write the stuctural formula....
67176.

1st members of ketone group

Answer» Propanone
Propanone
Propanone.......
67177.

What is the modern periodic law ?

Answer» \tThe periodic law given earlier is now modified and followed today. It states that "the properties of the elements are periodic functions of their atomic numbers."\tThe modern periodic table is also known as the long form of the periodic table or the extended form of the periodic table.\tIn this table, the elements are arranged in the order of increasing atomic numbers in such away that elements with similar properties fall in the same vertical column. These vertical columns are referred to as \'Groups \'. There are eight groups, which are further sub-divided into eighteen sub-groups. There are 7 horizontal rows in the periodic table.
According to modern periodic law property of elements are periodic function of their atomic n
the modern periodic law states that "the properties of elements are periodic functions of their atomic number............
67178.

What do you mean by allele.........

Answer» Allele means gene pair
Means??
?.?
Alleles or allelomorphs are the different forms of the same gene....!!
67179.

The presence of particular group of bacteria ib water bodies indicates contamination.

Answer» Coliform bacteria
Coliform os the answer
S its right
Coliform bacteria
67180.

Refractive index of medium 1 with respect to medium 2 in the given by

Answer» Is it n2/n1
67181.

What is synapses

Answer» Synapse(or gap) is a space present between the nerve ending of one neuron and the dendritic tip of neuron next to it.
Gap between two neuron
67182.

Why milkman add bakind soda in milk during summer

Answer» To prevent the curdling
67183.

How may male gametes are produced by pollen ?

Answer» There are two male gametes are produce by each pollen grains. one fuses with the egg to form embryo and another fuses with polar nuclei give rise to endosperm. the process of fusion of polar nuclei give rise to endosperm is called triple fusion. The fusion of egg is a process known as syngamy. Both this process is known as double fertilisation.
67184.

2018 10th class papar question 8 ka b part

Answer»
67185.

" sweet tooth can led the tooth decay " explain why?

Answer» Sorry its dailog
When we eat something sweet then the ph or our mouth goes below 5.5 and it facilitates the action of bacteria on our teeth....if we do use toothpaste then it can b overcomed....as bacteria present in our mouth starts dissolving our teeth..and we may as a result suffer frm tooth decay
Sweet tooth .............bcoz sweet tooth means eating sweet things like chocolates and other candies,toffees etc and this led to tooth decay ,cavity and other oral problems.
It is because sweet things make our mouth acidic
67186.

Which part of the brain control sensation of hunger?

Answer» Hypothalamus
67187.

Why respiration is called exothermic reactions

Answer» Respiration is an exothermic reaction because as a result of respiration an amount of energy is released, which is used by our body.
Respiration is called as exothermic process because heat is released during this process.C6H12O6------------->Co2+H2O+Heat
Resp...............................bcoz in exothermic reactions heat or energy is liberated or released just like in respiration energy is released.
67188.

The refractive index of diamond is 2.42. Explain this statement

Answer» It means that when light ray is passed from a diamond it will bends the direction of the ray at the high extent.More the refractive index more will be the bending.
67189.

What is olfactory

Answer» Olfactory receptors (ORs), also known as odorant receptors, are expressed in the cell membranes of olfactory receptor neurons and are responsible for the detection of odorants (i.e., compounds that have an odor) which give rise to the sense of smell.
Olfactory means the receptor that are present in our nose and detect smell.
67190.

Plz give me answer it is urgent

Answer»
67191.

What will form if we add excess of carbon dioxide to calcium hydroxide ?

Answer» When excess amt. Of co2 passed through it, it will again become colourless
Then,it s colour will suddenly change into milky and then white
Rajat Singh your answer is wrong . The correct answer is calcium bi carbonate or calcium di hydrogen carbonate.
Caoh+co2= caoco+h20
67192.

Why aluminium foil is used to wrap the food?

Answer» Because it acts as a complete barrier for light .heat.cold etc
67193.

Why milkman added baking soda in fresh milk?

Answer» To prevent milk to producing curd .because in summer .this was so fast
To prevent curdling of milk
67194.

Double circulation of blood in human beings

Answer» Double circulation means flowing of blood twice through the heart once in oxgenated form and other in deoxygenated form without intermixing.
When blood passes through heart twice before circulating to whole body then such type of circulation is called double circulation
67195.

Why are males called heterogametic

Answer» Hetrogamatic refers to the *** of a species in which the *** chromosomes are not the same. And males have different *** chromosomes Xand Y so, they are called heteogametic.
67196.

Define bicarbonates

Answer» It is a negative ion whose formula is HCO3
It means hydrogen carbonate
67197.

What is the main difference between stem cutting and layering

Answer» Cutting the stem by cross and fixing it to next plant cross and this is also known as grafting .Fixing the branch of the plant and it grows an another plant and this is known as layerindg
67198.

Can you give some exercise for solving the chapter periodic classification of elements

Answer» Yes,it is vry easy
67199.

If an object of mass

Answer» Pura questions bhejo
67200.

What is the target organ for adrenaline hormone

Answer» It plays an important role in the fight-or-flight response by increasing blood flow to muscles, output of the heart, pupil dilation response, and blood sugar level.