by abhishek | Aug 19, 2020 | Transportation
In human body, various substances such as oxygen, digested food, hormones and enzymes are transported from one part of the body to other parts through blood and lymph. Blood is red in colour due to the presence of red coloured pigment called haemoglobin in it....
by abhishek | Aug 19, 2020 | Transportation
The phloem vessels consist of sieve tubes and companion cells. Sieve tubesSieve tubes are long tubes which are made by end to end union of a large number of cells called sieve tube cells. The end walls of these cells are called sieve plates. These sieve plates bear...
by abhishek | Aug 19, 2020 | Transportation
In plants, food is prepared by the leaves by the process of photosynthesis. The food prepared by the leaves is in the form of simple sugars (glucose). No other part of the plant can prepare food. So, all the parts of a plant require food for getting energy,...
by abhishek | Aug 19, 2020 | Transportation
Like water, minerals are also necessary for plants to survive. About 16 minerals are necessary for plants. These minerals are present in soil in the form of inorganic salts such as nitrates and phosphates. In soil, these minerals get dissolved in water and are...
by abhishek | Aug 19, 2020 | Transportation
The transportation of water in plants takes place in following steps : Absorption of water by roots In plants, water is absorbed from the soil by root hairs present on roots. Each root hair has a thin permeable cell wall. In soil, the root hairs are directly in...
Recent Comments