Tissues — Science STD 9 — Question

The technique of growing two or more different crops together in the same field is known as:

The process of cross breeding two different varieties of crop plants each having a desire characteristic, is known as:

1. Selection
2. Hybridization
3. Crossing
4. Introduction

Which of the following is leguminous green fodder commonly available in winter?

1. Cow pea.
2. Elephant grass.
3. Berseem and lucerne.
4. Rice and jowar.

Signs of eutrophication of water bodies include:

1. Reduced oxygen demand.
2. Rapid decomposition of organic matter.
3. Algal bloom.
4. Fluorosis.

Lysosomes are also called:

1. Suicide bags.
2. Digestive bags.
3. Demolition squads.
4. All the above.

Lignified, narrow, elongated and dead cells are found in:

Which of the following is leguminous green fodder commonly available in winter?

Contractile proteins are found in:

Phylogeny is study of:

1. Development of an indicidual.
2. Evolution of species.
3. Embryonic development of an organ.
4. Ecological adaptation of an organisms.

Which scientist was the first to observe red blood cells in humans and other animals?