Improvement in Food Resources — Science STD 9 — Question

Hybridisation involves crossing of genetically similar plants.

Expand the following abbreviations:

NIDS.

In which phylum pseudocoelom occurs?

1. Puccinia causes ________ disease in wheat.
2. Blast is a _________ disease of paddy.
3. Chemical used to kill weeds are called ________.
4. Pesticides are ________ chemicals.

1. rust, fungal, weedicides, toxic.
2. fungal, rust weedicides, toxic.
3. rust, viral, pesticides, toxic.
4. rust, bacterial, weedicides, toxic.

Who coined the term biodiversity?

1. Pigeon pea.
2. Wheat.

Organic farming is the method of farming where synthetic chemicals are used.