earth system science center

Structure of the earth system Earth's history Earth in the solar syste..

Structure of the earth system Earth's history Earth in the solar syste..

The blood always remains inside the blood vessels and never comes in direct contact with the cells. The materials enter and exit the blood vessels through the walls. The blood flows in the blood vessels under high pressure such that it reaches all the parts of the body in good time. The blood vess..

Question: Give examples of some of the movements shown by plants. Answer: Movements as in animals is absent in plants except in cases of sperm cells of ferns and mosses swimming towards the egg. In plants, movement is associated with the growth of the plants. For example, the shoot ..

Plants Animals Cellulose cell wall surrounds the cell membrane Cell wall is absent in animal cells Plastids are present especially a green pigment called chlorophyll Chlorophyll is absent in animal cells Large vacuoles containing cell sap are present in plant cell Vacuole..

Question: Which statement is the most accurate? 1. 60% of the earth's land surface is now used to grow crops and graze animals. 2. Ganga and Yamuna rivers are covered under the Ganga Action Plan-I and II. 3. 9.73% of the total global supply of water is available for huma..

The earth's atmosphere is a heterogeneous mixture of minute particles. These particles include smoke, tiny water droplets, suspended particles of dust and molecules of air. When beam of light strikes such air particles, the path of the beam becomes visible. Similarly the path of a beam o..

Tyndall Effect - The earth's atmosphere is a heterogeneous mixture of minute particles. These particles include smoke, tiny water droplets, suspended particles of dust and molecules of air. When beam of light strikes such air particles, the path of the beam becomes visible. Similarly the ..

In case of plants, growth and development is in a coordinated manner. The higher plants do not show locomotion. However, locomotion is seen in structures like sperm cells of ferns and mosses that swim towards the egg. The other movements shown by the plants are associated with the growth of the pl..

Fullerenes are allotropes of carbon that were discovered as recently as 1985. They have been found to exist in the interstellar dust as well as in geological formations on earth. They are large cage like spherical molecules with formulae C 32 , C 50 C 60 , C 70 , C 76 , C 84 etc. The m..