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Structural Symmetry in a Flower

Identify the ...

Question

Identify the correct combination.

A

Neem- Absence of buds in the axils of leaflets- Pinnately compound leaf

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B

Sunflower- Opposite phyllotaxy - Inferior ovary

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C

Carrot- Flowers brought to same height due to varied lengths of pedicels- Involucre of bracts

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D

Pista- Discoid stem - Lateral branch with many internodes

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Solution

The correct option is D Pista- Discoid stem - Lateral branch with many internodes
Neem has a compound leaves. In it, the buds are present in the axil of leaflets. It has pinnately compound leaf.
Sunflower has alternate phyllotaxy. When the ovary is situated below the petals and sepals, it is called as inferior ovary. Sunflower has inferior ovary. In corymb, flowers are brought to the same height due to varied lengths of their pedicels. Examples include cauliflower.
In carrot, all flowers appear to arisen from the single point of peduncle. It is called as umbel inflorescence. It has involucre of bracts at the base of the whole inflorescence.
Pistia is an aquatic plant and has discoid stem. In this, lateral branches are found with short internodes. Each nodes has a rosette of leaves and tuft of roots.
Thus, the correct answer is 'Pista- Discoid stem - Lateral branch with many internodes.'

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Q. Study the statements and choose the right option.
(a) Buds are present in the axils of leaflets of a compound leaf
(b) Pulvinus leaf base is present in some leguminous plants

(c) In Alstonia, the petioles expand, become green and synthesise food

(d) Opposite phyllotaxy is seen in guava.

Q. Study the following statements and select the correct option
(i) Buds are present in the axil of leaflets of the compound leaf.
(ii) Pulvinus leaf-base is present in some leguminous plants.
(iii) In Alstonia, the petioles expand, become green and synthesize food.
(iv) Opposite phyllotaxy is seen in guava.

Q. I. Pulvinus leaf base is present in some leguminous plants.
II. Whorled phyllotaxy is seen in Calotropis.
III. In Australian Acacia the petioles expand, become green and synthesise food.
IV. A bud is present in the axils of leaflets of a compound leaf.
Of the above statements.

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(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.
(D) Palmately compound leaves are found in neem.
(E) Whorled phyllotaxy is found in Alstonia.
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