A) campylotropous
B) anatropous
C) amphitropous
D) orthotropous
Correct Answer: D
Solution :
Orthotropous ovule : When the micropyle, body of the ovule and funicle lie in one vertical plane the ovule is called as Orthotropous, eg, Polygonum, Piper etc. Hemianatropous ovule: When the funicle lies at right angle to the body of the ovule and micropyle, the ovule is called as hemianatropous. In other words, the body of the ovule has rotated by \[{{90}^{o}}C\], eg. Ranunculus, Primula, Golphimia etc. Anatropous ovule: When the funicle lies parallel to the body of the ovule and micropyle, ie, the body of the ovule has rotated by \[{{180}^{o}}C\] the ovule is called as anatropous. It is the most common type of ovule found in many families such as Malvaceae, Compositae, Cucurbitaceae, Solanaceae etc. Amphitropous ovule: It is similar to anatropous except for its U-shaped embryo sac. Here the curvature has affected the nucellus, eg, Butomus, Crossosoma etc. Campylotropous ovule: It is similar to hemianatropous except for the fact that due to further curvature the micropyle comes to lie closer to funicle, eg, Chenopodiaceae, Capparidaceae and several members of Leguminosae and Cruciferae.
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