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Sugar trnsport elements of gymnosperms a...

Sugar trnsport elements of gymnosperms and pteridophytes are

A

Sieve cells

B

Sieve elements

C

Sieve tubes

D

Sieve tube elements

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The correct Answer is:
A
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Sugar transport elements of gymnosperms & pteridophytes are -

Gymnosperms are

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Gymnosperms have

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Sex-organs of pteridophytes are

Assertion :- In angiosperms transport of food and water are more efficient , than gymnosperms and pteridophytes. Reason:-In angiosperm sieve elements and vessels are longitudinally arranged with their perforated, end wall

Gymnosperms include:

Vessels occur in (a) All angiosperms, all gymnosperms, and some pteridophytes (b) All angiosperms and some gymnosperms (c) Most angiosperms, a few gymnosperms and pteridophytes (d) All pteridophytes

The heterosporous pteridophytes are