Plant KingdomHard

Question

Whicch of the following is without exception in angiosperms ?

Options

A.Presence of vessels
B.Double fertilization
C.Secondaryu growth
D.Autotrophic nutrition

Solution

Afew plants (eg, Rafflesia) are parasitic. Some angiosperm genera are vesselless. Secondary growth does not take place in a large variety of angiosperms. However, double fertilization is met with amongstall angiosperms. In this one male gamete fuses with egg nucleus (n). This is known as syngamy and the aecond male gamete fuses with the secondary nuvleus (2n). This is known as triple fusion, Together these syngamy and triple fusion is known as double fertilization.

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