Improvement in Food Resources — Science STD 9 — Question

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

Two or more atoms chemically bonded together are called a:

Cylindrical muscle fibres which show alternate light and dark bands are:

1. Smooth muscle.
2. Cardiac muscle fibres.
3. Tendons.
4. Striated muscle fibres.

Milk is an example of :

The force of attraction between two unit point masses separated by a unit distance is called:

'The action and reaction are equal in magnitude'. Is this statement true and which law is related with it ?

Which of the following are also considered to be the states of matter?

1. Plasma.
2. Platelets.
3. BFC.
4. BHC.

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

Which of the following could not be a unit of acceleration?

1. km/s²
2. cms^-2
3. km/s
4. m/s²

For an element, Z = 9. The valency of this element will be:

Omnis cellulae cellualae i.e., new cells arise from pre-existing cells; this statement was given by ______.