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Phyllotaxy

Spiral phyllo...

Question

Spiral phyllotaxy in which sixth leaf lies above the first one after completing two circles is

A

Distichous

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B

Tristichous

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C

Pentastichous

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D

Octastichous

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Solution

The correct option is A Pentastichous
Pentastichous is the arrangement of leaves five vertical rank phyllotaxy. In this type, the 6th leaf is found above the 1st leaf, 7th above the 2nd and so on. The angular divergence is 2 or 5 of 3600 (1400). e.g., China rose
So, the correct answer is 'Pentastichous'

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Q. If more than one leaf is borne on same node arranged in a whorl, then the phyllotaxy is said to be___________.

Q. Read the following five statements (A - E)
(A) Sheathing leaf base is found in monocotyledons.
(B) In some leguminous plants the leaf base may become swollen, which is called the pulvinus.
(C) A bud is present in the axil of leaflets of the compound leaf.
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(E) Whorled phyllotaxy is found in Alstonia.
How many of the above statements are correct?

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