Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

31.

Which one of the following does'nt help in molecule transport?

  • Diffusion

  • Osmosis

  • Surface tension

  • Active transport


32.

Stomatal opening in plants occurs due to influx of

  • Na

  • K

  • ABA

  • Auxins


33.

Energy transfer in photosynthesis occurs as

  • Phycoerythrin Phycocyanin Carotenoid Chlorophyll a

  • Chlorophyll b Carotenoid Phycoerythrin Chlorophyll a

  • Phycocyanin Phycoerythrin Carotenoid Chlorophyll a

  • Chlorophyll b Carotenoid Phycocyanin Chlorophyll a


34.

Litmus is obtained from

  • Rocella montagnei

  • Lasallia postulata

  • Both (a) and (b)

  • Cladonia crispata


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35.

Commercial cork is obtained from

  • Flax

  • Juglans regia

  • Hevea brassiliansis

  • Quercus suber


36.

Tea and coffee are affected by

  • Phytophthora

  • Cephaleuros

  • Herviella

  • Albugo candida


37.

In photosynthesis what occurs in PS-II?

  • It takes longer wavelength of light and e- from H2O

  • It takes shorter wavelength of light and e- from H2O

  • It takes longer wavelength of light and e- from NADP

  • It takes shorter wavelength of light and e- from NADP


38.

Which are sensitive to SO2 pollution?

  • Mosses

  • Algae

  • Lichen

  • Ferns


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39.

Though Cycas has 2 cotyledons, this is not included in dicot because

  • naked ovule

  • they have megaspore

  • appears as palm tree

  • has compound leaves


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40.

In meiosis division is

  • Ist reductional and IInd equational

  • Ist equational and IInd reductional

  • both reductional

  • both equational


A.

Ist reductional and IInd equational

The term 'Meiosis' was given by Farmer and Moore (1905). To study meiosis in plants, anther is the best part. 

The process of meiosis involves two division of the genetic material. The first division is called reduction division or Meiosis I as it reduces the number of chromosomes from 46 chromosomes or 2n to 23 chromosomes or n.

Meiosis II is called equational division because it does not reduce chromosome numbers. A nuclear division that maintains the same ploidy level of the cell.


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