Question

An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is

cuticle

sporopollenin

lignin

cellulose

Solution

sporopollenin

Sporopollenin is a fatty substance present in the exine of pollen grains. It is resistant to microbial and chemical decomposition and can withstand the extreme environmental conditions. Due to presence of sporopollenin, pollen grains are well preserved during fossilization.

Some More Questions From Sexual Reproduction in flowering Plants Chapter

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.

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Sexual Reproduction In Flowering Plants

An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is

cuticle

sporopollenin

lignin

cellulose

Some More Questions From Sexual Reproduction in flowering Plants Chapter

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

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

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NCERT Sample Papers

Entrance Exams Preparation

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For Daily Free Study Material Join wiredfaculty

Sexual Reproduction In Flowering Plants

An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is cuticle sporopollenin lignin cellulose

Some More Questions From Sexual Reproduction in flowering Plants Chapter

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

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

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is

cuticle

sporopollenin

lignin

cellulose