Since cells are hard to see the microscope helped them see. scientist were able to actually see cells in tissues placed under the microscope.
Answer:
organism, population, community, ecosystem
Explanation:
The units of light energy emitted by blackbody radiation is originally called as quanta. Black body radiation is a type of radiation within a boy in thermodynamic equilibrium. This is a theoretical body. In 1900, Planck proposed that light and other electromagnetic waves were emitted in discrete packets of energy which were called "quanta". This was the original unit used.
