Who said that 'transpiration is a necessary evil' from Biology T

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 Multiple Choice QuestionsMultiple Choice Questions

31.

In plants, water supply is due to

  • osmosis

  • imbibition

  • guttation

  • adhesion force


32.

Most accepted theory for ascent of sap is

  • capillary theory

  • root pressure theory

  • pulsation theory

  • transpiration pull


33.

Which of the following theory gives the latest explanation for the closure of stomata?

  • ABA theory

  • Munch Theory

  • Starch glucose theory

  • Active K+ transport theory


34.

Root hair absorbs water from soil through

  • turgor pressure

  • ion exchange

  • osmosis

  • DPD


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35.

Who said that 'transpiration is a necessary evil'

  • Curtis

  • Andersen

  • Steward

  • J.C. Bose


A.

Curtis

Curtis (1926) called transpiration as necessary evil because it provides some beneficial aspects but on the other hand, many functioning and energy gets wasted from absorption of water upto the stage of transpiration.


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36.

Transpiration would be lowest when

  • wind velocity is high

  • enough water is in the soil

  • atmospheric RH is high

  • high temperature and light


37.

Which of the following exhibits a direct porportionality to transpiration

  • Light and RH

  • Temperature and RH

  • Temperature and wind

  • RH and wind


38.

Water in plants is transported by

  • cambium

  • phloem

  • xylem

  • epidermis


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39.

The most important force which pulls water up in tall trees is

  • imbibition force

  • osmotic force

  • cohesive force

  • electromagnetic force


40.

The light phase of photosynthesis is called

  • Hill reaction

  • photo action

  • pigment action

  • chlorophyllous process


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