Tissues — Science STD 9 — Question

Largest blood cells are:

Micrographia was written by which of the following scientists?

Root hairs of plants absorb water from soil through:

1. Diffusion.
2. Imbibition.
3. Osmosis.
4. All the above.

Who first saw and described a live cell?

The technique used to obtain variety with high yield and other desirable characters is:

1. Intraduction
2. Selection
3. Hybridization
4. Both (a) and (b).

A group of related genera, with still less number of similarities as compared to the genus and species, constitutes.

1. Order.
2. Class.
3. Family.
4. Division.

Oil seeds such as sesame and mustard are good sources of:

Nif genes occur in:

1. Rhizobium.
2. Streptococcus.
3. Penicillium.
4. Aspergillus.

Tissue found in area of regular wear and tear is:

Growing different crops in the same field in a pre planned succession is: