Sources of Energy — Science STD 10 — Question

The concept of sustainable development has been adopted to limit the damage being incurred to the environment. Justify.

Name one organism which reproduces by binary fission and another which reproduces by multiple fission.

Which colour of the spectrum has:

1. longest wavelength?
2. shortest wavelength?

Name the three allotropic forms of carbon.

Name the organisms belonging to the second and the fourth trophic levels in the food chain comprising the following:
Frogs, Plants, Snakes, Hawk, Insects.

Why do the walls of trachea not collapse when there is less air in it?

Give one example of a combination reaction which is also endothermic.

Construct.
A long food chain, and
A short food chain, ending with man.

Two non-metals combine with by the sharing of electrons to form a compound X.
Will it be a good conductor of electricity or not?

What are the four blood groups in humans?