What part of the flower is B ?

Seed structure that grows become roots

Seed structure that protects seed

A particular species of a plant produces,light non sticky ,numerous pollen grains and long and feathery stigma. These modifications facilitates the pollination by

Which one of the following is not part of a seed?

Choose all incorrectly matched pairs.

Nature prefers cross pollination. Mark ALL efforts made by nature to promote cross pollination over self pollination

Which of these are NOT necessary conditions for self-pollination to occur?

Choose all points that are advantage of self pollination

Choose all points that are advantages of cross pollination

Choose all points that are disadvantages of self pollination

____________ usually has separate male and female trees. Flowers of only one gender appear on the tree. This characteristic is called __________.

In orchids, even if self pollination occurs, the pollen from the same plant fails to undergo further growth. Only a pollen from another plant can effectively complete the process of seed creation. This phenomenon is called:

In pansies, a sort of hood protects the stigma. This phenomenon is called:

In oxalis, the anthers and the stigma are at two different levels. This prevents self pollination . This phenomenon is called:

Choose all incorrectly matched pairs.

Entomophilous plants have all of the following characteristics except:

This plant has flowers but they are not bright or scented. The flowers are small. The plant is well developed before the flowering begins. The stamen and stigma both hang outside the flower, and the pollen grains are light, dry, and smooth.

This plant is most likely to be a:

In some plants, the specific gravity of the pollen grain is equal to the specific gravity of water. This is useful for:

In __________, male flowers float on the surface of water until they meet female flowers.

Choose the right option for fill in the blanks:

The mature pollen grain is a cell with two walls - the outer ___________ and the inner ______. Its nucleus has already divided into a _______ nucleus, which leads the journey through the stigma, and a _______ nucleus.

Choose the right fill in the blanks.

Each ovule has one or two protective coverings, called the ________________.

These coverings leave a small opening called the _______________ at one end for the entry of the pollen tube.

At the center is the ____________, a mass of food laden cells.

Choose the correct order of the labels (1-5):

_________________________ is the union/fusion of the nuclei of the male and female gametes.

Identify the diagram

Read these 5 statements. Then choose the correct order in which these events happen.

A. The tube nucleus disintegrates

B. The generative nuclei splits into two male gamete nuclei/sperm nuclei

C. One sperm nucleus fuses with the egg cell while the other travels upwards to fuse with the two polar nuclei.

D. The pollen tube pushes through the micropyle and reaches the embryo sac.

E. The pollen tube grows through the stigma and reaches the ovary.