Tissues — Science STD 9 — Question

Collenchyma mainly forms __________.

Growing different crops in the same field in a pre planned succession is:

1. Crop management.
2. Crop rotation.
3. Intercropping.
4. Plant breeding.

The universal law of gravitation was postulated by:

The living substance of cell was named by Dujardin as __________.

In intercropping, there is maximum utilization of the supplied nutrients because:

A particle X has 17 protons, 18 neutrons and 18 electrons. This particle is most likely to be:

While putting clothes for drying up, why do we spread them out:

A man is 25m behind a bus, when bus starts accelerating at 2 m/ s² and man starts moving with constant velocity of 10 m/ s. Time taken by him to board the bus is _________?

The form of energy present in a wound spring is:

Which of the following is the high milk yielding variety of cow?

1. Holstein
2. Dorset
3. Sahiwal
4. Red Sindhi.