Phloem is a complex tissue of the angiosperm plants. It serves as a conducting tissue and is made up of four types of elements: (i) Sieve tube, (ii) Companion cells, (iii) Phloem fibres (bast fibres), and (iv) Phloem parenchyma.
Difference between Xylem and Phloem:
Xylem
Phloem
1. Xylem tissue helps in the transport of water and minerals.
1. Phloem tissue helps in the transport of food.
2.
Water is transported upwards from roots to all...
Xylem and phloem are known as complex tissues as they are made up of more than one type of cells. These cells work in a coordinated manner, as a unit,...
(a) Fossil fuels are coal, petroleum and natural gas.
(b) Process of separation of different constituents from petroleum is called refining.
(c) Least polluting fuel for vehicles is CNG.
[Hint : Drugs used to check pregnancy in women to control birth rate. Oral contraceptives contains a mixture of synthetic estrogen and progesterone derivatives.