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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 44251. |
To prepare a good tempory mount of the petunia leaf peel showing manyy stomata? |
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| 44252. |
What is meant by double fertilization??? |
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Answer» it is complex fertilisation mechanism of flowering plants Double fertilization1. Syngamy --in this one male gamete fuses with female gamate to form diploid zygote and than this zygote get converted in embryo which further grows into seed.2.Triple fusion--in this one male gamete fuses with two polar nuclei to form triploid endosperm which provides nourishment to the growing seed Hope this definition help u jahanvi...?? Double fertilization : It occurs when one male nucleus fertilizes (fuses) with egg cell to form zygote cell and other male nucleus fuses (fertilizes) with two polar nuclei to cause triple fusion. As these two types of fertilizations take place at the same time in the ovule of the plant, it is known as double fertilization. Flowering plants perform double fertilization. It is the fusion of two male gamets brought up by a pollen tube with two different structure of the same embryo sac, one forming embryo and other endosperm. |
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| 44253. |
Write the structure of nephrone |
| Answer» Nephron:- It is basic functional unit of kidneys. A kidney is composed of about 2 million nephrons. The nephron uses four mechanisms to convert blood into urine: filtration, reabsorption,\xa0secretion, and\xa0excretion\xa0of numerous substances. It actually produces urine in the process of removing waste and excess substances from the blood.Hope it helps:-) | |
| 44254. |
How. Are characteristic transmitted to progeny |
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Answer» Characteristics are transmitted to the progenies through genes which are present on the chromosomes. While reproduction process chromosomes carrying genes from both mother and father are transmitted to the offspring. All the genes from both mother and father combine together and express themselves to show phenotypic characters in the offspring. Characteristics are transmitted to the progenies through genes which are present on the chromosomes. While reproduction process chromosomes carrying genes from both mother and father are transmitted to the offspring. All the genes from both mother and father combine together and express themselves to show phenotypic characters in the offspring.Hope it helps:-) |
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| 44255. |
when object is at infinity...where can image form |
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Answer» At focus At focus At focus At the focus On focus.... |
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| 44256. |
What will be the sign if image distance of concave or convex lens or mirror is given? |
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Answer» It depens whether the image formed is real or virtual.If it is virtual, then:In mirrors-v= positive In lenses-v= negativeIf it is real, then:In mirrors-v= negativeIn lenses-v= positive It depends on the object position and nature of the image..both the signs can possible.. Concave (-)convex + Concave mirror(-) and convex mirror (+) Concave mirror ( + ) and convex mirror( -) |
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| 44257. |
What are the causes of variation? |
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Answer» Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism\'s offspring). Dna is the info. Source for the making of protein if there is any change in the info. making diff .protein will be made which will led to variation |
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| 44258. |
what is double circulatory system explain in detail? |
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Answer» In human beings, the blood goes through the heart twice during each cycle i.e. the blood passes through the human heart two times to supply once to the whole body. So, it is called Double Circulation of blood.The double circulation of blood includes:(i) Systematic Circulation(ii) Pulmonary CirculationSystematic Circulation: It supplies oxygenated blood from left auricle to left ventricle, thereby pumped to various body parts. The deoxygenated blood is collected from the various body organs by the veins to pour into vena cava and finally into the right atrium (auricle). Right atrium transfers the blood into the right ventricle.Pulmonary Circulation : The deoxygenated blood is pumped by the right ventricle into the lungs for oxygenation. The oxygenated blood is brought back to left atrium (auricle) of the human heart. From left atrium, the oxygenated blood is pushed into the left ventricle. The left ventricle pumps oxygenated blood into aorta for systematic circulation.\xa0\xa0 The circulation of blood from lungs to heart and then to all part of body as the deoxygenated blood is back to heart and it go to lungs again this is known as double circulation |
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| 44259. |
May i get the snapes of science practical file..class 10...plzz |
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| 44260. |
Difference Between fragmentation and regeneration.?? |
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Answer» \tFragmentationRegenerationOrganisms that are fragmented result in each fragment growing into an individual organismRegeneration occurs when an organism wants to regrow a lost limb or any other part of the body.A new individual emerges from each fragmentNo new organisms are formedOnly few very organisms can fragment and form a new individualAll organisms exhibit some the ability to regenerate to some degreeFragmentation is observed in organism such as flatworms and spongesExamples of regeneration include regrowing a lost limb, such as the tail of a lizard\t fragmentation it is a process in which simple multi cellular organisms or prokaryotes simply divides and grows into a fully matured individual regeneration it is a process in which an organism is cut into pieces and the each piece grows to a fully mature individual Difference is that FRAGMENTATION specifies two parts each growing into complete organisms, but REGENERATION is simply a general process of regrowth |
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| 44261. |
Explain how characteristics are inherited through genes? |
| Answer» The traits are inherited through genes.Genes code for proteins which decide all the traits like eye colour, height etc. Genes are basic unit of heredity and are located on the chromosomes. During gamete formation the chromosomes carrying genes segregate resulting in inheretance of traits. | |
| 44262. |
about dams |
| Answer» DAM is mde to control flood, for irrigation purposes, for fish breading, and for sports. | |
| 44263. |
Is reproduction is important for us |
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Answer» Bhai hmare liye to h teri tujhe pta hogi For increasing our population. It maintains race of individual species in this earth.. Yes..in fact it is important for all the organisms |
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| 44264. |
Which substance is formed when two gametes fuses together? |
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Answer» OK Ms No need to say thanks Thanx esha Zygote which is diploid in nature Thanx shrikansh Zygote |
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| 44265. |
What is meant by EMULSIFICATION of fat. |
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Answer» One more question, Which protein digesting enzyme is present in pancreatic juice?? It means breaking down fat into fatty acid and glucagon. Thanks BRO?? Means breaking down of fat gobules into smaller one |
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| 44266. |
What is reduce |
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Answer» This means that you use less...like you can save electricity by switching off unnecessary lights Using of less natural resources and avoiding of waste of natural resource. Like save electricity by switching of unnecessary fans/bulb , repairing leakage tap. reduce means that we use less of the natural resources by cutting down on those practices whicj lead to their wastage What is reduce |
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| 44267. |
Define 1dioptre of power of lens |
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Answer» When focal length of lens is 100cm or 1m then the power of lens is 1 dioptre.. 1 dioptre of lens whose focal length is 1 metre 1/focal length |
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| 44268. |
Give questions of heridity and evolution that your teacher tells you Don\'t say refer to app |
| Answer» solve sample papers | |
| 44269. |
From which chapter more question will come |
| Answer» Hmm nice questions board se puchiye | |
| 44270. |
Is mendel\'s experiment is important |
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Answer» Yes tooo important Ya |
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| 44271. |
Cerebrum has been folded into convulsions to do the controlling function of the body.justify |
| Answer» It is believed that more the convolution better the intelligence | |
| 44272. |
Double displacement reaction |
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Answer» hey!! friend!!double displacement reaction is the reaction in which there is a mutual exchange of ions .example:- NaSO4+BaCl2→ 2NaCl2+BaSO4 (precipitate)hope it helps:-) The reaction in exchange of ions occur in reactants |
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| 44273. |
What is mean of life prosses |
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Answer» These are the basic function performed by living organisms for thier survival and body maintenance The processes which are necessary for the maintenance of life/living organisms are called life processes. E.g. , respiration, circulation, etc. Hope it helps:-) \'Living being \'; Basic concept of nutrition, respiration, transport and excretion in plant and animal |
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| 44274. |
Important questions from control and coordination other than Brain |
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Answer» Control and coordination is small chapter yaar so all topics are important Plant hormone, tropism and their example, synapse, reflex arc, neuron, dormancy |
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| 44275. |
Short note on all plant hormones |
| Answer» 1. Auxins2. Gibbreline3. Cytokinnin4. Ethylin5. Absisic acid | |
| 44276. |
What are the achievement and limitation of mendleev periodic table ? |
| Answer» Achievement1. He left some gaps for other future elements.2. He named by prefixing a sanskrit numerical eka.LiLimitation\'s1. He could not assigned correct position of hydrogen.2. The atomic masses could not increase in regular manner. | |
| 44277. |
All importent question |
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| 44278. |
What is the change see in girls during age of puberty |
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Answer» Fat get store on the thyes. 1.Increasing the size of breast.2.pubic hair.3.hairs in armpit. Growth of pubic hair. There voice changes. Menstruation starts. Breast size increase. |
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| 44279. |
What is detergent? ?? |
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Answer» They have cleanging property and it can remove durt into water. Ammonium or sulphonate salts of long chain carboxylic acids Detergents are the sodium or potassium salt of sulphonic acid A detergent is a sodium salt of long chain of benzene symphonic acid.... Ammonia or benzoate salts of long chain carboxylic acid Detergent are the component which is use for cleaning of clothes.. |
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| 44280. |
Define heteroatoms |
| Answer» Any atom that does not have any hydrogen or carbon is called hetroatoms | |
| 44281. |
Define thermal energy |
| Answer» a powerplant in which the heat required to make steam to drive turbines is obtained by furning fuels like coal is called thermal power plant....an through which energy produced is thermal energy | |
| 44282. |
Descrjbe double circulation in human beings |
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Answer» It cotain plumeary and systmatic circulation. When the blood flows twice in the heart in each cycle is known as the double circulation.. A circulatory system in which blood travels twice through the heart in one complete cycle of the body During a single cycle blood goes twice in the heart which is known as double circulation . |
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| 44283. |
What is saponification and essterfication reaction. Write its difference |
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Answer» The reaction of alcohol and acetic acid to form ester are known as esterification reaction.The hydrolysis of esterification is known as sponification reaction. Esterification : The reaction of an alcohol with an acid to produce ester and water.Saponification : Alkaline hydrolysis of ester is called saponification reaction . The process of hydrolysis of fats and oil with alkali is called saponification whereas the reaction b/w a carboxylic aid and a alcohol to form easter is called essterfication reaction |
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| 44284. |
Ozone formation and depletion |
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Answer» Formation of the ozone layer.O2 - O+O(atomic oxygen)Then,O2+O - O3 The O2 molecules present in the atmosphere breaks to "O" molecules due to the UV rays The "O" combines with "O2" molecules present in the atmosphere to form "O3" This forms the ozone layerBut the use of harmful chemical substances like chloro flouro carbons (cfcs) depletes the ozone layer. |
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| 44285. |
What are the ways to induced current in a coil |
| Answer» There are three ways to induce current 1 by permanent magnet2 by flowing current 3 by change in nagnetic field | |
| 44286. |
Describe blood circulatory system in human beings? |
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Answer» Its too long Please ans. the functions of heart |
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| 44287. |
Why the star is twinkle at night? Why the planet does not twinkle? |
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Answer» Star emit their own light and they twinkle due to atmospheric refraction. When the star light enters the earth atmosphere it vets refracted at different levels due to difference in the air density of different levels of atmosphere. Hence when the star comes more towards us it seems brighter than it comes less towards us. Thus we see as if the stars are twinkling at night.Planets do not twinkle because they are very large in size and are more closer to the earth as compared to stars. Planets can be called as point sized sources of light .various parts of the planets emit light in such a way that the average of the dimmer and the brighter effect is zero. Hence planets do not twinkle. Stars are too far away as they appear and the earth\'s air has many layers with different refractive index which keeps changing so when the light of star come to tje earth\'s atmosphere it keeps deviating so it appears like they are twinkling and the planets are closer to earth than the stars so they do not appear to twinkle Far away=more twinkle.Closer= less twinkle.Hope it helps you ? because of refraction in atmisphere......and stars are more away from our earth then other planets |
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| 44288. |
How does solinoid behave like a magnet |
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Answer» Solenoid is a coil having n number of turns . When current is passed through the solenoid a magnetic force will experience. This magnetic force is similar to that of bar magnet . When the north pole of the bar magnet is brought near too the negative terminal of the solenoid it will repel each other . This shows that solenoid will behave like a magnet. because it have rod fill with soft iron and cover with number of turn of copper wire through which current can flow....this shows it have magnetic field around it As on passing electric current it forms a electromagnet The magnetic field produced by it is similar to the magnetic field of a bar magnet. |
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| 44289. |
What is the magnetic field are use in dc generator? |
| Answer» Static magnetic field | |
| 44290. |
Most expected questions for science in sectionD |
| Answer» Monohybrid or dihybrid | |
| 44291. |
To reduce the brightness what will you do? |
| Answer» the iris of tge eye expands n contracts the pupil which allow less light | |
| 44292. |
What is autonomous nervous system? |
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Answer» The specific set of nerves that mainly controls and integrates the functions of internal organs is called autonomic nervous system. It controls the body organs, such as heart, blood vessel, glands, smooth muscles and uterus in the body; that are not directly under control of our will. Autonomic nervous system consists of: (i) Sympathetic and (ii) Para-sympathetic systems. They have opposite effects on the organ i.e., if one stimulates the organ the other inhibits its action. Autonomic nervous system is meant by system which performs body actions automatically. |
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| 44293. |
Why is necessary double circulation blood on human beings |
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Answer» Necessity (Importance) of Double Circulation:There is a partition between the right side and the left side of human heart which is particularly useful to prevent mixing of deoxygenated with oxygenated blood. This type of separation of deoxygenated and oxygenated blood ensures highly efficient\xa0supply\xa0of oxygen to the body. This is important in case of humans because it constantly gives energy to maintain their body temperature. In double circulation of blood ,blood enters the heart twice in one single heartbeat. First time oxygenated blood eners the left artrium and second time the deoxygenated blood enters the right artrium . Thus double circulation of blood prvents the mixing of oxygenated and deoxygenated blood and the enery requirement will be fulfilled To maintain the body temperature. For highly efficient supply of oxygen to the body. |
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| 44294. |
How to Draw an schematic diagram of domestic circuit??? |
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Answer» Question:\xa0Draw a schematic labelled diagram of a domestic circuit which has a provision of main fuse, one light bulb, meter and a socketOr See on Google .... Aata toh hai .... Par yah kaise banate hai vo nahi aata hai .... |
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| 44295. |
What is a *** chromosomes |
| Answer» Determines the gender of the person | |
| 44296. |
Why planet does not twinkle? |
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Answer» Because these are too close too earth and doesn\'t able to refract in atmosphere as the far star can Planets do not twinkle because there are very big and near to us due to wish light coming from them comes in the form of beam which do not get retracted in atmosphere that\'s why planets do not twinkle As it is very close to earth and thus are larger in size .The amount of light entering our eye average out to zero and thus nullifying the twinkling effect |
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| 44297. |
Explain the working of electric generator |
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Answer» An electric generator converts mechanical energy into electrical energy. The principle behind the electric motor is based on Fleming\'s right hand rule.when a coil of insulated copper wire is forced to rotate inside a magnetic field then electric current is induced. The following figure shows circuit diagram of a simple AC generator. If axle X is rotated clockwise, then the length PQ moves upwards and the length RS moves downwards.\xa0Since the lengths PQ and RS are moving in a magnetic field, a current will be induced due to electromagnetic induction. Length PQ is moving upwards and the magnetic field acts from left to right. Hence, according to Fleming\'s right hand rule, the direction of induced current will be from P to Q. Similarly, the direction of induced current in the length RS will be from R to S. The direction of current in the coil is PQRS. Hence, the galvanometer shows a deflection in a particular direction. After half a rotation, length PQ starts moving down whereas length RS starts moving upward. The direction of the induced current in the coil gets reversed as SRQP. As the direction of current gets reversed after each half rotation, the produced current is called an alternating current (AC). To get a unidirectional current, instead of two slip rings, two split rings are used, as shown in the following figure. In this arrangement, brush A always remains in contact with the length of the coil that is moving up whereas brush B always remains in contact with the length that is moving down. The split rings C and D act as a commutator.The direction of current induced in the coil will be PQRS for the first half and SRQP in the second half of the rotation. Therefore a unidirectional current is produced from the generator called DC generator Working of electric generator. Axle rotates mechanically , two slip rings rotating such that AB move up and CD move down.. First half is clock wise rotation. The generated current flows B2 toB1.. By applying right hand rule.. The second half rotation CD moves up and AB moves down.. Current flow to B1 to B2. See in this app |
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| 44298. |
How to balance an unbalanced equations |
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Answer» First try to balance the metal and tn non metal and then oxygen and hydrogen First try to balance the metal. Then it will be easy.or u can see it on youtube |
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| 44299. |
Why blood does not clot in blood vessels |
| Answer» Blood does not clot in blood vessels due to presence of Hiperin as it is a anticoagulant which prevent cloting in blood vessels but this Hiperin stop working when it is in contact of air that\'s why when we get injured and blood is coming out Hiperin stops working and their clot forms | |
| 44300. |
Why twinkling star |
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Answer» Due to atmospheric refraction. Because of atmospheric refraction |
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