Home
Class 12
BIOLOGY
It is said , that diseases are sprea...

It is said , that diseases are spreading faster due to globalisation and increased movement of people .Justify the statement taking the example Of `H_(5) N_(1)` virus .

Text Solution

Verified by Experts

The avian flu is a current and significant involving the global environment as well as the heath of millions of people around the world ,The `H_(5)N_(1)` Virus (influenza -A) occurs maily in highly contagious them and can be deadly the major global environmental issue that plays a large role in the advancement of the `H_(5)N_(1)` avian influenza virus is globlisation i.e., increasing intergration of countries .
through globalisation , the progrssion of the `H_(5)N_(1)` avian infuenza virus occur through the world at a pace faster than scientisis can snticipate and also technology and resarch cannot possibly keep up Globalistion will give the `H_(5)N_(1)` avian influenza vrius ans opportunity to travel to varoous parts of the world without impediment.
Once . it has developed the ability to spreased easily from human to human , the major concern becomes the travel of individuals around the word , particularly air travel . an infected individual could infect dozens of people during their movement those newly infected indviduuals would in infect Dozens of people During their movement , those newly infected individuls would in turn , infect Dozens more , and so on and so forth.
Promotional Banner

Topper's Solved these Questions

  • STRATEGIES FOR ENHANCMENT IN FOOD PRODUCTION

    NCERT EXEMPLAR ENGLISH|Exercise Long Answer type Questions|8 Videos

  • STRATEGIES FOR ENHANCMENT IN FOOD PRODUCTION

    NCERT EXEMPLAR ENGLISH|Exercise Long Answer type Questions|8 Videos

  • SEXUAL REPRODUCTION IN FIOWERING PIANTS

    NCERT EXEMPLAR ENGLISH|Exercise Long Answer Type Questions|5 Videos

Similar Questions

Explore conceptually related problems

Statement 1 is True: Statement 2 is True; Statement 2 is a correct explanation for statement 1 Statement 1 is true, Statement 2 is true;2 Statement 2 not a correct explanation for statement 1. Statement 1 is true, statement 2 is false Statement 1 is false, statement 2 is true Statement I: If (log)_(((log)_5x))5=2,\ t h n\ x=5^(sqrt(5)) Statement II: (log)_x a=b ,\ if\ a >0,\ t h e n\ x=a^(1//b) a. A b. \ B c. \ C d. D

When there are x milligrams of a certain drug in a patient's bloodstream, a patient's heart rate, h, in beats per minute, can be modeled by the equation h=60+0.5x . Which statements are true? I. 10 minutes after taking the drug, the patient's heart rate increase to 75 beats per minute. II. When the drug is not in the bloodstream, the patient's heart rate is 70 beats per minute. III. For each 10 milligram increase of the drug in the patient's bloodstream, the patient's heartbeat increase 5 beats per minute.

Give the correct order of initials T or F for following statements. Use T if statement is true and F if it is falese : (I) The order of repulsion between different pair of electron is I_(p)-I_(p)gtI_(p)-b_(p)gtb_(p)-b_(p) (II) In general, as the number o flone pair of electron on central atom increases, value of bond angle from normal bond angle also increases (III) The number of lone pair on O in H_(2)O is 2 while on N in NH_(3) is 1 (IV) The structures of xenon fluorides and xenon oxyfluorides could not be explained on the basis of VSEPR theory

Give the correct order of initials T or F for following statements. Use T if statement is true and F if it is falese : (I) The order of repulsion between different pair of electron is I_(p)-I_(p)gtI_(p)-b_(p)gtb_(p)-b_(p) (II) In general, as the number o flone pair of electron on central atom increases, value of bond angle from normal bond angle also increases (III) The number of lone pair on O in H_(2)O is 2 while on N in NH_(3) is 1 (IV) The structures of xenon fluorides and xenon oxyfluorides could not be explained on the basis of VSEPR theory

Coordination compounds plays many important roles in animals and plants. The are essential in the storage and transport of oxygen as electrons transfer agents as catalysts and in photosynthesis Wide range of application in daily life takes place through formation of complexes Photographic fixing qualitative and quantitative analysis purification of water metallurgical extraction are some specific worth mentioning The complex [Fe(H_(2)O)_(5)NO]^(2+) is formed in the brown ring test for nitrates when freshly prepared FeSO_(4) soultion is added to aqueous solution of NO_(3)^(Θ) followed by addition of conc. H_(2)SO_(4) Select correct statement about this complex (a) Colour change is due to charge transfer (b) It has iron in +1 oxidation state and nitrosyl as NO^(o+) (c ) It has magnetic moment of 3.87BM confirming three unpaired electrons in Fe (a) All the above are correct statements .

A function f is said to be periodic if it repeats its nature after certain interval and that interval is called period of the function. If T be the period of f(x), then f(x + T) = f(x). For example f(x) = tan x is periodic with period pi . Then find the period of f(x) that satisfies the following condition. (i) f(x + 1) - f(x + 3) = 0 (ii) f(x + 3) + f(x) = 0 (iii) f(x-1) + f(x+3) = f(x+1) + f(x + 5) (iv) f(x + p) = 1+{(1-f(x-p))^(2n+1)}^((1)/(2n+1)), n in N

T=(R^(2))/(r^(2))sqrt((2h)/(g)) Suppose an open cylindrical tank has a round drain with radius t in the bottom of the tank. When the tank is filled with water to a depth of h centimeters, the time it takes for all the water to drain from the tank is given by the formula above, where R is the radius of the tank (in centimeters) and g=980"cm/"s^(2) is the acceleration due to gravity. Suppose such a tank has a radius of 2 meters and is filled to a depth of 4 meters. About how many minutes does it take to empty the tank if the drain has a radius of 5 centimeters? (1 meter=100 centimeter).

Niels Bohr a Danish physicist received his PhD from the University of Copenhagen in 1911. He that spent a year with J.J. Thomson and Ernest Rutherford in England. In 1913, he returned to Copenhagen Where he remained for the rest of his life. In 1920 he was named Director of the Institute of theory! Physics After first World War Bohr worked energetically for peaceful uses of atomic energy recieved the first Atoms for Peace award in 1957 Bohr was awarded the Nobel Prize in Physics 1922 (a) The Angular momentum of an electron in a given stationary state can be expressed as m_e vr =h/(2pi) where n=1, 2,3 ...... Thus an electron can move only in those orbits for which its angular momentum is integral multiple of h/2 pi that is why only certain fixed orbits are alowed (b) The radii of the stationary states are expressed as r_n=n^2a_0 where a_0 =52.9 pm. Thus the radius the first stationary state, called the Bohr radius, is 52.9 pm. Normally the electron in the hydrogen atom is found in this orbit (that is n =1). As n increases the value of r will increase (c) The most important property associated with the electron E_n=-2.18xx10^(-18)(Z^2/n^2)J n=1,2,3 (d)it is also possible to calculate to calculate the velocities of electrons moving in these orbits by using v_n=2.18 10^6xxZ/n m/sec. Qualitatively the magnitude of velocity of electron increases with increase of positive charge on the nucleus and decreases with increases the value of n. (e)Bohr's theory can also be applied to th ions containing only one electron, similar to that present it hydrogen atom. For example , He^+ Li^(2+) , Be^(3+) and so on. given by the expression Ex=-218x n=1,2,3 (d) It is also possible to calculate the velocities of electrons moving in these orbits by using V 2.1810 cm/sec Qualitatively the magnitude of velocity of electron increases with increase of positive charge on the nucleus and decreases with increase the value of n (e) Bohr's theory can also be applied to the ions containing only one electron, similar to that presenti hydrogen atom For example, Help, Be and so on Choose the correct statement

Niels Bohr a Danish physicist received his PhD from the University of Copenhagen in 1911. He that spent a year with J.J. Thomson and Ernest Rutherford in England. In 1913, he returned to Copenhagen Where he remained for the rest of his life. In 1920 he was named Director of the Institute of theory! Physics After first World War Bohr worked energetically for peaceful uses of atomic energy recieved the first Atoms for Peace award in 1957 Bohr was awarded the Nobel Prize in Physics 1922 (a) The Angular momentum of an electron in a given stationary state can be expressed as m_e vr =h/(2pi) where n=1, 2,3 ...... Thus an electron can move only in those orbits for which its angular momentum is integral multiple of h/2 pi that is why only certain fixed orbits are alowed (b) The radii of the stationary states are expressed as r_n=n^2a_0 where a_0 =52.9 pm. Thus the radius the first stationary state, called the Bohr radius, is 52.9 pm. Normally the electron in the hydrogen atom is found in this orbit (that is n =1). As n increases the value of r will increase (c) The most important property associated with the electron E_n=-2.18xx10^(-18)(Z^2/n^2)J n=1,2,3 (d)it is also possible to calculate to calculate the velocities of electrons moving in these orbits by using v_n=2.18 10^6xxZ/n m/sec. Qualitatively the magnitude of velocity of electron increases with increase of positive charge on the nucleus and decreases with increases the value of n. (e)Bohr's theory can also be applied to th ions containing only one electron, similar to that present it hydrogen atom. For example , He^+ Li^(2+) , Be^(3+) and so on. given by the expression Ex=-218x n=1,2,3 (d) It is also possible to calculate the velocities of electrons moving in these orbits by using V 2.1810 cm/sec Qualitatively the magnitude of velocity of electron increases with increase of positive charge on the nucleus and decreases with increase the value of n (e) Bohr's theory can also be applied to the ions containing only one electron, similar to that presenti hydrogen atom For example, Help, Be and so on Choose the incorrect curve : if v=velocity of electron in Bohr's orbit r=Radius of electron in Bohr's orbit P.E.=Potential energy of electron in Bohr's orbit K.E.=Kinetic energy of the electron in Bohr's orbit.

Strong acid versus strong base: The principle of conductometric titrations is based on the fact that during the titration, one of the ions is replaced by the other and invariable these two ions differ in the ionic conductivity with the result that thhe conductivity of the solution varies during the course of the titration. take, for example, the titration between a strong acid, say HCl, and a string base, say NaOH before NaOH is added, the conductance of HCl solution has a high value due to the presence of highly mobile hydrogen ions. As NaOH is added, H^(+) ions are replaced by relatively slower moving Na^(+) ions. consequently the conductance of the solution decreases and this continues right upto the equivalence point where the solution contains only NaCl. Beyond the equivalence point, if more of NaOH is added, then the solution contains a excess of the fast moving OH^(-) ions with the result that its conductance is increased ad it condinues to increase as more and more of NaOH is added. If we plot the conductance value versus the amount of NaOH added, we get a curve of the type shown in Fig. The descending portion AB represents the conductances before the equivalence point (solution contains a mixture of acid HCl and the salt NaCl) and the ascending portion CD represents the conductances after the equivalence point (solution contains the salt NaCl and the excess of NaOH). The point E which represent the minium conductance is due to the solution containing only NaCl with no free acid or alkali and thus represents the equivalence point. this point can, however, be obtained by the extrapolation of the lines AB and DC, and therefore, one is not very particular in locating this point expermentally as it is in the case of ordinary acid-base titrations involving the acid-base indicators. Weak acid versus strong base: Let us take specific example of acetic acid being titrated against NaOH . Before the addition of alkali, the solution shows poor conductance due to feeble ionization of acetic acid. Initially the addition of alkali causes not only the replacement of H^(+) by Na^(+) but also suppresses the dissociation of acetic acid due to the common ion Ac^(-) and thus the conductance of the solution decreases in the beginning. but very soon the conductance start increasing as addition of NaOH neutralizes the undissociated HAc to Na^(+)Ac^(-) thus causing the replacement of non-conducting HAc with Strong-conducting electrolyte Na^(+)Ac^(-) . the increase in conductance continuous right up to the equivalence point. Beyond this point conductance increases more rapidly with the addition of NaOH due to the highly conducting OH^(-) ions, the graph near the equivalence point is curved due to the hydrolysis of the salt NaAc . The actual equivalence point can, as usual, be obtained by the extrapolation method. In all these graphs it has been assumed that the volume change due addition of solution from burrette is negnigible, hence volume change of the solution in beaker the conductance of which is measured is almost constant throughout the measurement. Q. The nature of curve obtained for the titration between weak acid versus strong base as described in the above passage will be:

NCERT EXEMPLAR ENGLISH-STRATEGIES FOR ENHANCMENT IN FOOD PRODUCTION-Very short answer types Questions
  1. The term ' desirable trait ' can mean different things for differe...

    Text Solution

    |

  2. you are planning to set up a dairy farm. Describe the various asp...

    Text Solution

    |

  3. It is said , that diseases are spreading faster due to globali...

    Text Solution

    |

  4. Explain the concept of the blue revolution .

    Text Solution

    |

  5. A farmer was facing problem of low yield from farm ,He was adv...

    Text Solution

    |

  6. Life style diseases are increasing alarmingly in india .we are a...

    Text Solution

    |

  7. How can we improve the success rate of fertillisatin artificial...

    Text Solution

    |

  8. What is meant by germplasm collection what are its benefits ?

    Text Solution

    |

  9. Name the improved characteristics of wheat that helped india to ...

    Text Solution

    |

  10. Suggest some of the features of plants that will prevent insect...

    Text Solution

    |

  11. it is Easier to culture the plant cells in vitro as compared ...

    Text Solution

    |

  12. 'The culture medium(nutrient medium) can be used as a highly enriched ...

    Text Solution

    |

  13. is there any relationship between dedifferention and the higher deg...

    Text Solution

    |

  14. Give me a living cell of any plant and I will give you a thousa...

    Text Solution

    |

  15. what is the difference between a breed and a species ? Give an exa...

    Text Solution

    |

  16. Plants rised though tissue cultures are clones of the parent pla...

    Text Solution

    |

  17. Discuss the improtance of testing of new plant varieties in a g...

    Text Solution

    |

  18. Define the term stress for plnats .Discuss briefly the two types o...

    Text Solution

    |

  19. Discuss natural selection and artificial selection . What are th...

    Text Solution

    |

  20. Discuss briefly how pure lines are created in animal husbandry.

    Text Solution

    |