Which of the following types of ovules has the micropyle directed in the downward direction?
[1 mark]

Orthotropous ovule

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Circinotropous ovule

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Hemianatropous ovule

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Anatropous ovule

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Solution

The correct option is D Anatropous ovule
Anatropous ovule has the micropyle directed in the downward direction.
Orthotropous ovule is the one in which the micropyle is pointed in the upward direction. It is completely straight ovule.
Circinotropous ovule also has the micropyle in the upward direction while hemianatropous ovule has the micropyle aligned at right angles to the body of the ovule.

Suggest Corrections

List I	List II
(A) The micropyle of the ovule close to the funicular as a result of $180^{o}$ curvature	(I) Primula
(B) The micropyle, chalaza and funiculus of the ovule are on the same vertical line	(II) Loranthus
(C) The body of the ovules is placed right angles to the funiculus and bends in such way that micropyle comes towards funiculus	(III) Helianthus
(D) The ovules are without integuments	(IV) Polygonum (V) Sphagnum