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A system of rotating crops with legume o...

A system of rotating crops with legume or grass pasture to improve soil structrue and fertility is called

A

Shifting agriculture

B

Ley farming

C

Contour farming

D

Strip farming

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A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called

Which of the following statement/s is/are and example of genetic engineering? I. Inserting a gene for human insulin production into bacteria. II. Selective breeding to produce cattle with high milk yields. III. Using methods like crop rotation with leguminous plants to increase the fertility of the soil. IV. Vegetative propagation and grafting are practised to ensure higher yield.

The material of biological origin, which is used to maintain and improve soil fertility is (a) Bio pesticide (b) Bionutrient (c) Chemical fertilizers (d) Green manure

Without the rotation of crop by a pulse in between cereals, the farmer observed the increases in natural fertility due to

A Crop rotation decreases the soil fertility. R High concentration of minerals is required as fertilizers.

A frame of reference that is accelerated with respect to an inertial frame of reference is called a non-inertial frame of reference. A coordinate system fixed on a circular disc rotating about a fixed axis with a constant angular velocity omega is an example of non=inertial frame of reference. The relationship between the force vecF_(rot) experienced by a particle of mass m moving on the rotating disc and the force vecF_(in) experienced by the particle in an inertial frame of reference is vecF_(rot)=vecF_(i n)+2m(vecv_(rot)xxvec omega)+m(vec omegaxx vec r)xxvec omega . where vecv_(rot) is the velocity of the particle in the rotating frame of reference and vecr is the position vector of the particle with respect to the centre of the disc. Now consider a smooth slot along a diameter fo a disc of radius R rotating counter-clockwise with a constant angular speed omega about its vertical axis through its center. We assign a coordinate system with the origin at the center of the disc, the x-axis along the slot, the y-axis perpendicular to the slot and the z-axis along the rotation axis (vecomega=omegahatk) . A small block of mass m is gently placed in the slot at vecr(R//2)hati at t=0 and is constrained to move only along the slot. The distance r of the block at time is

A frame of reference that is accelerated with respect to an inertial frame of reference is called a non-inertial frame of reference. A coordinate system fixed on a circular disc rotating about a fixed axis with a constant angular velocity omega is an example of non=inertial frame of reference. The relationship between the force vecF_(rot) experienced by a particle of mass m moving on the rotating disc and the force vecF_(in) experienced by the particle in an inertial frame of reference is vecF_(rot)=vecF_(i n)+2m(vecv_(rot)xxvec omega)+m(vec omegaxx vec r)xxvec omega . where vecv_(rot) is the velocity of the particle in the rotating frame of reference and vecr is the position vector of the particle with respect to the centre of the disc. Now consider a smooth slot along a diameter fo a disc of radius R rotating counter-clockwise with a constant angular speed omega about its vertical axis through its center. We assign a coordinate system with the origin at the center of the disc, the x-axis along the slot, the y-axis perpendicular to the slot and the z-axis along the rotation axis (vecomega=omegahatk) . A small block of mass m is gently placed in the slot at vecr(R//2)hati at t=0 and is constrained to move only along the slot. The net reaction of the disc on the block is

TRUEMEN BIOLOGY ENGLISH-(AIPMT(NEET Phase-1)-2016)(Conducted by CBSE on 01-05-2016)(Solved Paper)-MCQs
  1. The primitive prokaryotes responsibel for the production of biogas fro...

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  2. Which of the following features is not present in Periplaneta american...

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  3. A system of rotating crops with legume or grass pasture to improve soi...

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  4. Which of the following is wrongly matched in the given table

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  5. In mammals, which blood vessel would normally carry largest amount of ...

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  6. Pick out the correct statements (A) Haemophilia is a sex-linked rece...

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  7. Which of the following guards the openingof hepatopancreatic duct into...

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  8. Microtubules are the constituents of

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  9. The coconut water from tender coconut represents

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  10. Tricarpellary syncarpous gynoecium is found in flowers of

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  11. Which of the following is not a stem modification

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  12. The taq polymerase enzyme is obtained from

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  13. Stems modified into flat green organs performing the functions of leav...

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  14. In higher vertebrates, the immune system can distinguish self-cells an...

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  15. Nomenclature is governed by certain universal rules. Which one of the ...

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  16. In bryophytes and and pteridophytes, transport of male gametes require...

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  17. In context of Amniocentesis, which of the following statement is incor...

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  18. In the stomach, gastric acid is secreted by the

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  19. Spindle fibers attach on to

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  20. Which is the National Aquatic Animal of India

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