P-2 Introduction to Microbiology — Science STD 10 — Question

Vertebrates have been slowly originated from invertebrates.

Hydroelectric energy, solar energy and wind energy are called renewable energies. Why?
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Hydroelectric energy, solar energy and wind energy are called renewable energies.

In cold regions, in winter the pipes for water supply break.

Write scientific reason.
The flame appears yellow in the ignition of naphthalene.

Microbial enzymes are used instead of chemical catalysts in chemical industry. (March 2019)
(OR)
Microbial enzymes are said to be eco-friendly.

Fibers are one of the important nutrients.

There is a need for classification of animals.

Give scientific reasons Indians should follow family planning for controlling the population.

Girls are facing the problem of stress due to such gender inequality.

When an iron nail is dipped into a copper solution, a shiny coat of copper is formed on the nail.