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Sexual Reproduction In Flowering Plants

Question

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Double fertilisation was discovered by

Nawaschin

Starsburger

Emerson

None of the above

Solution

A.

Nawaschin

The two gametes released by the pollen tube move in opposite direction most probably the streaming currents of cytoplasm. One gamete fuses with egg called fertilisation and second fuses with two polar nuclei called triple fusion i.e. fertilisation and triple fusion jointly called double fertilisation. It was first observed by Nawaschin (1848) in Lilium and Fritillaria. This phenomenon is unique to angiosperm.

Some More Questions From Sexual Reproduction in flowering Plants Chapter

The fertilization occurs in the :

The female gametophyte of a typical dicot at the time of fertilization is:

Development of embryo from any cell of nucellus is called :

Parthenocarpic fruit is :

The entry of pollen tube into embryo sac through the integuments is termed as :

512 microspores will be formed following meiosis of how many microspore mother cells.

Pollination by water occurs in :

In ................... flowers, the thalamus grows upwards completely enclosing the ovary, and the stamens, petals and sepals are borne above the ovary.

In Calotropis, all the microspores of anther lobe remain united to form

Albuminous seeds store reserve food materials in ....................

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