When pollen grains are suspended in water and viewed thro...
When pollen grains are suspended in water and viewed through a microscope, they appear to be in a state of constant but erratic motion. This is due to?
convection currents
small changes
small changes in temperature
a chemical reaction between the pollen grain and water
the bombardment of the pollen grains by molecules of water
Correct answer is E
No explanation has been provided for this answer.
A visible change is observed when a strip of iron is placed in an aqueous solution of ...
An oxide XO2 has a vapour density of 32. What is the atomic mass of X?...
Electrolysis is applied in the following processes except ...
It is difficult to achieve an orderly arrangement of the molecules of a gas because they? ...
Which of the these metals will not liberate hydrogen from dilute HCI? ...
Carbon (ll) oxide may be collected as shown above because it...
What is the atomic number of Iodine? ...
Detergents are manufactured with straight hydrocarbon chains, is to make them ...