In frogs, different mating seasons are a barrier to reproduction.
Answer:
Electrons can move from one substance to another when objects are rubbed together.
Answer:
The correct answer is carbon.
Explanation:
Carbon is the major constituent of almost all organic compound.Carbon in form of carbon dioxide is used during photosynthesis in which the CO2 act as reactant that interact with water to generate glucose and oxygen.
On the other hand carbon is found in carbohydrates such as glucose contain 6 carbon atoms,found in protein which contain a carboxy terminal end and an amino terminal end,found in the fatty acid monomers of lipid molecules.
He discovered that cells come from cells that already exist
The only continent to not have any bees is the continent of antarctica
