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$ Sieve tubes have "P" proteins. ! In ...

$ Sieve tubes have "P" proteins.
! In gymnosperms, sieve tubes are associated with albuminous cells.

A

If both As and R are correct and R is correct explanation of As

B

If both As and R are correct but R is not correct explanation of As

C

If As is correct, R is wrong

D

If both As and R are wrong.

Text Solution

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The correct Answer is:
B
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DINESH PUBLICATION-ENVIRONMENTAL ISSUES-Assertion and reason
  1. $ Phylloclade is a stem modification. ! There are present flowers on...

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  2. $ Xylem is a simple permanent tissue. ! Xylem is present in Bryophyt...

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  3. $ Sieve tubes have "P" proteins. ! In gymnosperms, sieve tubes are a...

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  4. $ Xylem condition in roots is exarch ! Xylem has four different type...

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  5. $ Secondary growth occurs in those plants which have closed vascular b...

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  6. $ Leaves of monocots are amphistomatic. ! Dicot leaf has dimophic ce...

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  7. $ In osmosis, semipermeable membrane is a must. ! Cell wall is semip...

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  8. $ "Transpiration pull Theory" was proposed by Dixon and Joly . ! Los...

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  9. $ Water potential of distilled water is zero. ! C(2) cycle is also c...

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  10. $ those subtances which reduce the rate of transpiration are called tr...

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  11. $ Chlorosis means destruction or the loss of chlorophyll pigments. ...

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  12. $ The phenomenon of soil-less culture of plants is called Hydroponics....

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  13. $ Flower of Rafflesia is largest sized. ! Large flowers have wind po...

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  14. $ Insectivorous plants get nitrogenous nutrition from the insects. ...

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  15. $ Process of separation of photosynthetic pigments is called chromatog...

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  16. P(680) is calld PS II ! C-4 plants hav photorespiration.

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  17. $ Rhipidium is a type of helicoid uniparouscyme. ! Sorosis fruit is ...

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  18. $ Actinomorphic flower has a regular symmetry. ! Shoe-flower is acti...

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  19. $ Diadelphous has two groups of epipetalous stamens. ! Dichogamy ref...

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  20. $ Single cotyledon of monocots is called Scutellum ! Monocots show s...

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