We eat food composed of all the nutrients such as carbohydrates, proteins, fats, vitamins, minerals and water. After digestion, they are absorbed in the form of glusoce, amino acids, fatty acids, glycerol, etc. What mechanisms are involved in the absorption of digested food and water?

A person takes concentrated solution of salt. After sometime he starts vomiting. What is the phenomenon responsible for such a situation? Explain.

Name any cell organelle which is nonmembranous.

If you are provided with some vegetables to cook, you generally add salt into vegetables during cooking process. After adding salt, vegetables release water. What mechanism is responsible for this?

If cells of onion peel and RBC are separately kept in hypotonic solution what among the following will take place? Explain the reason for your answer. (a) Both the cells will swell (b) RBC will burst easily while cells of onion peel will resist the bursting to some extent. (c) a and b both are correct (d) RBC and onion peel cells will behave similarly.