The Fundamental Unit of Life — Science STD 9 — Question

A rocket rises up in the air due to the force generated by the fuel. The work done by the:

How is a bacterial cell different from an onion peel cell:

A ball is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy when its reaches the maximum height?

Green house effect is caused by:

1. Green plants.
2. Infrared rays.
3. UV-rays.
4. X-rays.

An ionic compound will be formed by the combination of one of the following pairs of elements. This pair of elements is:

The mass of moon is about 0.012 times that of earth and its diameter is about 0.25 times that of earth. The value of G on the moon will be:

1. Less than that on the earth.
2. More than that on the earth.
3. Same as that on the earth.
4. About one-sixth of that on the earth.

The first experiment in artificial insemination was performed by:

1. Aristotle
2. Berzelius
3. Spallanzani
4. Linnaeus

According to the third law of motion, action and reaction:

1. Always act on the same body but in opposite directions.
2. Always act on different bodies in opposite directions.
3. Have same magnitudes and directions.
4. Act on either body at normal to each other.

The cell organelle involved in forming complex sugars from simple sugars are:

Heart muscles are: