Answer:
D
Explanation:
Bohr determined that there are discrete (unique, different from one another) energy levels in the atom and that electrons will orbit the nucleus within these energy levels, known as orbitals.
Scientific laws or laws of science are statements, based on repeated experiments or observations, that describe or predict a range of natural phenomena. ... Scientific laws summarize the results of experiments or observations, usually within a certain range of application.
A cell is <span>the smallest structural and functional unit of an organism. It effects the body by making and strengthening tissue, fighting unwanted cells, and by giving off oxygen throughout the body.</span>
Nitrogen fixation is the process where atmospheric nitrogen is converted by bacteria into biologically usable forms.
plant can not take nitrogen directly from the leaves.
