Improvement In Food Resources — Science STD 9 — Question

Cell was discovered by:

Simple epithelium is a tissue in which cells are:

1. Hardened and provide support to organs.
2. Continuously dividing to provide to form an organ.
3. Cemented directly to one another to form a single layer.
4. Loosely connected to one another to form an irregular layer.

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 is not a function of epidermis?

In binomial nomenclature consists of two words:

1. First alphabet of generic name.
2. All alphabet of generic word.
3. First alphabet of specific word.
4. All alphabets of specific word.

Palcoid scales are present in:

1. Anabas.
2. Scoliodon.
3. Lizard.
4. Crorodile.

In desert plants, rate of water loss gets reduced due to the presence of:

The botanical name of Dhaincha is:

1. Phaseolus vulgaris.
2. Lens culinaris.
3. Trifolium alexandrium.
4. Sesbania aculeate.

The growing of ____ crops on a piece of land in a pre-planned succession is known as crop rotation:

Lateral line sense organs occur in:

1. Fishes.
2. Amphibian larva.
3. Reptiles.
4. Both (a) and (b).