Improvement in Food Resources — Science STD 9 — Question

Heart muscles are:

In a free fall the velocity of a stone is increasing equally ion equal intervals of time under the effect of gravitational force of the earth. Then what can you say about the motion of this stone? Whether the stone is having:

Why is the weight of an object less on the moon than on earth?

Epithelial tissue always has an exposed outer surface and an inner surface anchored to connective tissue by a thin, non-cellular structure called the:

1. Nonstratified layer.
2. Stratified membrane.
3. Basement membrane.
4. Fibroblast.

3.42g of sucrose are dissolved in 18g of water in a beaker. The numbers of oxygen atoms in the solution are:

Lysosomes are also called:

Soil erosion can be prevented by:

1. Terrace farming.
2. Intensive cropping.
3. Deforestation.
4. Both (a) and (b).

Which condition out of the following will increase the evaporation of water:

The excretory organs of Annelida are:

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