The Fundamental Unit of Life — Science STD 9 — Question

On listening to his friend, Amit said “Moon does not work as it goes round our earth”, because:
A: Moon displaces perpendicular to direction of force.
B: No force acts on the moon.
C: Momentum change is non-zero.
Which of the combination is/ are correct?

Which of the following is micronutrient?

.......... are involved in intracellular digestion?

Odometer is to mileage as compass is to:

Phylum Chordata is named after the occurrence of:

1. Notochord.
2. Dorsal hollow nerve cord.
3. Occurence of postnatal tail.
4. Presence of gill slits.

The English name of an element is potassium, its Latin name will be:

1. Plumbum.
2. Cuprum.
3. Kalium.
4. Natrium.

Identify the sub-atomic particle(s) with no charge and relative mass equal to one among the following:

Define velocity.State its unit:

.......... determines the function and development of the cell.

Poultry farming is undertaken to raise following:

1. Egg production.
2. Feather production.
3. Chicken meat.
4. Milk production.

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