The Fundamental Unit of Life — Science STD 9 — Question

Multinucleate conditions is seen in:

1. Only smooth nuscles cells.
2. Only skeletal muscle cells.
3. Both smooth and skeletal muscle cells.
4. Neither smooth nor skeletal muscle cells.

Nutrients can be provided to crops by fertilizers only.

What is the size of bluw whale?

What is acid rain?

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.

Give two examples of social diseases.

Which one determines the density and richness of biota?

Name any inexhaustible natural resource.