Improvement in Food Resources — Science STD 9 — Question

What do you mean by global warming?

What are eukaryotes?

Mention different aspects of fish culture.

1. What are the two ways of obtaining fish?
2. What is the major problem faced in fish farming? How can it be overcome.

A farmer grows gram crop between two cereal crops. What agricultural practice is being followed?

Give the scientific name of the following:

1. Mosquito fish.
2. Flying fish.

Name the bacterium capable of nitrogen fixation which resides in the root nodules of legumes.