Nutrition in Animals — Science STD 7 — Question

What is so special about the leaves that they can synthesise food but other parts of the plant cannot?

Name the living organism that helps in maintaining the supply of nutrients to the growing plants in the forest.

Write the colour of copper sulphate solution obtained when iron nails are dipped in it?

A food stall owner was preparing dough for making bhaturas. He added a pinch of yeast and sugar to the dough and left it in a warm place. After few hours, the dough had risen. There was a sour smell too.
Why did the dough rise?

Boojho now understands why clinical thermometer cannot be used to measure high temperatures. But still wonders whether a laboratory thermometer can be used to measure his body temperature.

Wind pollinated flowers produce large number of pollen grains. Give reasons.

What causes the smoke to rise?

What is the purpose of using a cell holder in a circuit?

Classify the following as motion along a straight line, circular or oscillatory motion:Motion of a child on a see - saw.

Why is the process of reproduction necessary?