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Home » The mode of attachment of ovule to the placenta is known as placentation which is of the following types: Parental, Marginal, Axile, Free central and Basal.
The mode of attachment of ovule to the placenta is known as placentation which is of the following types: Parental, Marginal, Axile, Free central and Basal.
Biology | CBSE | Class 11 | Morphology of Flowering Plants | NCERT Exemplar
The mode of attachment of ovule to the placenta is known as placentation which is of the following types: Parental, Marginal, Axile, Free central and Basal.

Solution:

Sunflower is not a flower but a type of inflorescence called capitulum in which the receptacle is flattened. The ring of bract at the base of the inflorescent axis is known as an involucre. Two kinds of florets are recognized in sunflower:

(i) Ray Florets – Arranged on the rim of a receptacle having distinct yellow and strap-shaped petals. These florets are female, sterile, and are always zygomorphic, and may be arranged in one or more whorls.

(ii) Disc florets – Grouped in the center, bisexual and actinomorphic.

i

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