july 28th/ 09

some animals, like reptiles, don´t drink but obtain their water supploes from the food they eat. many of thing they eat heve a hight water content and provide them with all the water they need.

other animals such as the majority of mammals and birds need a greater quantity of water and so they have to drink it as well.

land animals, including people, cannot drink salt water. salt water does not shop you from feeling thirsty. quite the contrary, it makes you feel even thirstier.

PLANTS NEED WATER TO SURVIVE

plants need water for three basic reasons:

1-plants can only absort mineral salts hrom the soil if they are dissolved in water. 2-water is the means of transport of the substances inside the plant. 3-plants only produce food product if they have water.

plants that live in very dry region like deserts have long roots with lots of bronches so that very they can collect as much water as possible.

plants that live in humid or wet dreas like the jungle, have no difficulty obtining water from the soil.