Question

There are at least two families ............... where the product of double fertilization soon disintegrates and endosperm development is completely absent.

• A. Orchidaceae and podostemonaceae
• B. Asteraceae and fabaceae
• C. Poaceae and brassiaceae
• D. All above

Answer 1

The correct option is A Orchidaceae and podostemonaceae

Endosperm formation is suppressed in Orchidaceae, Trapaceae and Podostemonaceae. In these forms, triple fusion is completed but the fusion product either degenerates immediately or undergo only 1 or 2 divisions. These plants like orchids, lack endosperm in their seeds. Double fertilization is one of the characteristic features of all flowering plants. But endosperm formation is suppressed.

So, the correct answer is 'Orchidaceae and podostemonaceae'