The Fundamental Unit of Life — Science STD 9 — Question

What is soil? How does it form?

The cell division is restricted to:

1. Meristematic cells.
2. Permanent cells.
3. Secretory cells.
4. All the above.

Hotspots of biodiversity means:

1. Areas of the Earth that contain many endemic species.
2. Species serves as proxy for entire communities in particular areas.
3. Species in particular niche/ area.
4. Species diversity at particular areas.

Major component of the atmosphere on Venus and Mars planet is:

1. Carbon dioxide.
2. Oxygen.
3. Nitrogen.
4. Water vapours.

Animal husbandry is the scientific management of:

1. Animal breeding.
2. Culture of animals.
3. Animal livestock.
4. Rearing of animals.

1. (i), (ii) and (iii)
2. (ii), (iii) and (iv)
3. (i), (ii) and (iv)
4. (i), (iii) and (iv)

The excretory organs of Annelida are:

1. Nephridia.
2. Statocysts.
3. Archeocytes.
4. None of the above.

Starfish belongs to phylum:

1. Mollura.
2. Coelenterata.
3. Arthropoda.
4. Echinodermata.