What had Priestly done to introduce the mint plant without disturbing the experiment set-up?

What were Priestly's observations in this experiment ?

A uniform chain of length L is lying on the horizontal table.If the coefficient of friction between the chain and table top is m, what is the maximum length of the chain that can hang over the edge of the table without disturbing the rest of the chain on the table?

Write the following items about the experiment you have done to show that plants to light a) Used equipments b) Method of the experiments. c) Observed results

Answer the following questions by observing the diagram. What is the experimental set up?

In an experiment demonstrating the evolution of oxygen in Hydrilla , sodium bicarbonate is added to water in the experiment ste- up . What would happen if all other conditions are favourable ?

What did Priestly hypothesize on the experiment he conducted on the role of air in the growth of plants ?

To observe Anaerobic respiration a student conducted experiment with yeast. In this experiment, What did he do to speed up the test ?

What is the reason to keep a plant in dark for 48 hours to know photo-synthesis experiment in plants ?

What is the reason to keep a plant in dark for 48 hours to conduct experiments on photosynthesis in plants?

If pollination is not done in the flowering plants, what would be the consequences?