Sexual Reproduction In Flowering Plants

Question

Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?

Circinotropous

Anatropous

Amphitropous

Atropous

Solution

Amphitropous

In an amphitropous ovule, the embryo sac becomes horse- shoe shaped and the funiculus and micropyle are close to each other. It is found in Alismaceae, Butamaceae families.

Circinotropous ovule- The nucellus and the axis are in the same line in the beginning but due to rapid growth on one side, the ovule becomes anatropous.

Anatropous ovule is a completely inverted ovule turned back 180 $°$ on its stalk.

Some More Questions From Sexual Reproduction in flowering Plants Chapter

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.

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Sexual Reproduction In Flowering Plants

Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?

Circinotropous

Anatropous

Amphitropous

Atropous

Some More Questions From Sexual Reproduction in flowering Plants Chapter

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 ....................

Transfer of pollen grains from the anther to the stigma of another flower of same plant is called..............................

The...................direct the growth of pollen tube towards egg apparatus by secreting some chemical substances.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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For Daily Free Study Material Join wiredfaculty

Sexual Reproduction In Flowering Plants

Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other? Circinotropous Anatropous Amphitropous Atropous

Some More Questions From Sexual Reproduction in flowering Plants Chapter

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 ....................

Transfer of pollen grains from the anther to the stigma of another flower of same plant is called..............................

The...................direct the growth of pollen tube towards egg apparatus by secreting some chemical substances.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?

Circinotropous

Anatropous

Amphitropous

Atropous