The Fundamental Unit of Life — Science STD 9 — Question

Cell wall is made up of:

Which one is made of dead cells:

The growing of different crops on a piece of land in pre-planned succession is called: 

Which one of the following species of honey bee is an Italian species?

1. Apis Mellifera.
2. Apis Dorsata.
3. Apis florae.
4. Apis Cerana Indica.

Which type of tissue forms the inner lining of a blood vessel?

Water will be absorbed by the root hair because:

The selection of crops in mixed cropping is in such a way that they support each others growth:

In animal cell which cell organelle is absent?

Epithelial tissue always has an exposed outer surface and an inner surface anchored to connective tissue by a thin, non-cellular structure called the:

1. Nonstratified layer.
2. Stratified membrane.
3. Basement membrane.
4. Fibroblast.

A group of similar freely inter-breeding organisms constitutes a:

1. Species.
2. Genera.
3. Family.
4. Class.