The Fundamental Unit of Life — Science STD 9 — Question

Guard cells are present in:

1. Cork.
2. Cortex.
3. Stomata.
4. Vascular bundle.

Plasma content of blood is:

1. 35%
2. 55%
3. 65%
4. 80%

Which one of the following nutrients is not available in fertilizers?

1. Nitrogen
2. Phosphorus
3. Iron
4. Potassium

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.

The idea ‘omins cellula e cellula’ which means that all living cells arise from preecisting cells was given by:

1. Robery Brown
2. Purkinje
3. Rudolf Virchow
4. Schleiden

Martix of cartilage in made of:

1. Collagen
2. Chondrin
3. Ossein
4. Elastin

Describe nitrogen cycle.