10-Differential cytological techniques.
11-slide making of onion peel and tipo
12-Procedure and methods of seed and
pollen tube germination.
13-Dissection of flower to black paper
floral parts.
b) To show T. S pollen Sac and ovary.
Answers
Answer:
10 : In this technique the differential stains applied on the bacterial smear reveals the different types of cells at one point, reveals one part of the cell with one color and other parts a different color.
11 : (in the above picture)
12 : Pollen Germination Methods Pollen is anatomically simple organ compared to other highly differentiated tissues and other plant organs. Pollen develops within the anther and at maturity contains the products of sporophytic gene expression, arising from the tapetal layer of the anther wall, and gametophytic gene expression from the vegetative and generative nuclei. When a pollen grain falls on a receptive stigma, the stored RNA, protein, and bioactive small molecules allow rapid germination and outgrowth of a tube that penetrates and grows within the style. Experiencing the most rapid growth of any plant cell known, which is restricted exclusively to the tip of the tube, the pollen tubes eventually deposit the two sperm cells in the embryo sac where they fuse with the egg and central cell to form the zygote and endosperm respectively. Pollen quality must be assessed to find plant fertility, to monitor pollen state during storage, ecological or taxonomic studies, pollen biochemistry, stigma interactions, incompatibility systems and fertilization, breeding, genetics and conservation ecology
13 : When you look at the flower of a flowering plant, the most obvious parts are probably the petals. They can vary in size and shape but are usually brightly colored. Their purpose is to attract the bees and other insects that help to pollinate the plants. You might be surprised to learn that some flowers—in the botanical world they are called "perfect flowers"—have male parts and female parts, and each plays an important role during pollination.
The male parts, called stamens, look like long stalks (known as filaments) with a little round shape at their end (called the anther), which contains the plant pollen. This bright yellow or orange dust is what insects carry from one plant to another. Pollination occurs if the pollen gets carried to the female parts of a new flower, called the pistil. The pistil is usually a long stalk located in the center of the flower and is also made up of several parts. Most importantly it contains the ovary at its bottom, which houses the female plant eggs called ovules. When pollen is dropped into the pistil of a flower, the eggs, or ovules, inside the plant ovaries are fertilized. The fertilized ovules then grow into plant seeds, and the ovary becomes the fruit.
As you can see, a flower is much more than just beautiful to look at: it is essential for a plant to create more plants. Take a closer look at the many different plant parts in this activity, and see how they differ from one flower to another!
