Question

(i) After pollination, the ___ absorbs sugar and water secreted by (ii) ___ to grow (iii) towards ___. This tube grows downwards through (iv) ___ and reaches the (v) ___. This tube pushes through the (vi) ___ and reaches (vii) the ___.

a. After pollination, the style absorbs sugar and water secreted by (ii) the ovule to grow (iii) away from the stigma. This tube grows downwards through (iv) the ovary wall and reaches the (v) pollen grain. This tube pushes through the (vi) sepal and reaches (vii) the anther.
b. After pollination, the pollen tube absorbs sugar and water secreted by (ii) the ovule to grow (iii) towards the ovule. This tube grows downwards through (iv) the style and reaches the (v) egg cell. This tube pushes through the (vi) ovary wall and reaches (vii) the stigma.
c. After pollination, the stamen absorbs sugar and water secreted by (ii) the style to grow (iii) away from the ovule. This tube grows downwards through (iv) the petal and reaches the (v) anther. This tube pushes through the (vi) filament and reaches (vii) the sepal.
d. After pollination, the ovary absorbs sugar and water secreted by (ii) the sepal to grow (iii) towards the stigma. This tube grows downwards through (iv) the anther and reaches the (v) style. This tube pushes through the (vi) pollen grain and reaches (vii) the ovule.

Answer 1

The full statement which accurately describes the process of pollen tube growth and fertilization after pollination is ``After pollination, the pollen tube absorbs sugar and water secreted by (ii) the ovule to grow (iii) towards the ovule. This tube grows downwards through (iv) the style and reaches the (v) egg cell. This tube pushes through the (vi) ovary wall and reaches (vii) the stigma.``

The answer is option ⇒B

Step-by-step explanation:

After pollination, the pollen tube plays a crucial role in the fertilization process of flowering plants.

Let's break down the steps:

(i) After pollination, the pollen tube absorbs sugar and water secreted by (ii) the ovule to grow (iii) towards the ovule.

• - Pollen grains are deposited on the stigma during pollination. The pollen tube emerges from the pollen grain and grows towards the ovule, attracted by chemical signals and nutrients secreted by the ovule

This tube grows downwards through (iv) the style and reaches the (v) egg cell.

• - The pollen tube elongates and grows through the style, a slender tube-like structure connecting the stigma and the ovary. It continues to grow towards the ovule, specifically targeting the egg cell.

This tube pushes through the (vi) ovary wall and reaches (vii) the stigma.

• - As the pollen tube grows, it penetrates the tissues of the ovary wall, breaking through barriers to reach the ovule. Eventually, the tube reaches the stigma, completing its journey.

The correct answer is option b) After pollination, the pollen tube absorbs sugar and water secreted by the ovule to grow towards the ovule. This tube grows downwards through the style and reaches the egg cell. This tube pushes through the ovary wall and reaches the stigma.