Answer:
The invention of the electron microscope allowed them to see organelles and other structures smaller than cells. There is variation in cells, but all cells have a plasma membrane, cytoplasm, ribosomes, and DNA. These similarities show that all life on Earth has a common ancestor in the distant past
If a snowstorm is predicted in Chicago, then the conditions should be
upper air temperature = low
surface temperature = high
air pressure = low
For a snowstorm to occur, warm air must rise above cold air. The pressure must also be below atmospheric pressure.<span />
The cell contains many nuclei containing DNA, so DNA synthesis and mitosis are taking place, but the cell is not undergoing cytokinesis.
A water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen. Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds.
