(i) Ostrich (Struthio cametus), its egg size is about 15 em x 13 cm weighing about 3 pounds.
(ii) An egg provides sufficient proteins, fats, vitamin A and vitamin D.
(iii) Eggs contains lot of cholestrol that may cause heart diseases. We should not eat many eggs in a day for long period.
(iv) Our duty is that we should make our friends, relatives and community to know about useful and harmful effects of eating eggs.

Robert Hooke (1665), Robert Hooke b chance observed a slice of cork through a self-designed microscope. He observed that it  contained many little compartments, like a honeycomb, which he named as cells.
However, Leeuwenhoek (1674) discovered the free-living cells in pond water for the first time, b y his improved microscope.

The following  three things could happen:
(i) If the solution surrounding the cell is very dilute than cytoplasm, the water will move into the cell, i.e., the cell will gain water.
(ii) If the solution has exactly similar water concentration as that of cytoplasm of cell, there will be no net movement of water across the cell membrane, i.e., no gain or loss of water from the cell.
(iii) If the medium (solution) has a lower concentration of water than the cell, i.e., the solution is concentrated, the cell will lose water by osmosis.

(i) Lysosomes are membrane-bound sacs filled with digestive enzymes.These enzymes are made by rough endoplasmic reticulum.
(ii) Lysosomes are a kind of waste disposal system of the cell.
(iii) During the disturbance in cellular metabolism, e.g. when a cell gets damaged, lysosomes present in the cell may burst and the enzymes digest the damaged cell. Hence, lysosomes are called as 'suicidal bags' of a cell.
(iv) Lysosomes break up the foreign materials entering into the cell, such as bacteria or food into smal piece

(i) We will give ORS (Oral Rehydration Solution) from time to time till we reach to doctor or doctor comes to attend the patient. ORS is available in powder form packed in sachets.
(ii) We can make ORS in home by the following way:
Ingredients
1. One level teaspoon of salt
2. Eight level teaspoon of sugar
3. One litre of clean drinking or boiled water and then cooled (5 cupfuls-each cup about 200 .ml.),
Preparation Method
Stir the mixture till the salt and sugar dissolve.
(a) Arrange community lectures, debates to sensitise harmful effects of dehydration of the body.
(b) Conveying importation of ORS and its preparation in home