They stirred the water and poured it through a paper filter into a container. Gray powder was left on the filter. The container's water was clear. When it dried, they weighed the gray powder. It weighed 5 grams.
Living cells have at least three parts.
They can live only where there is light. They have no roots to anchor them to the ocean floor. The pressure is too great for them to survive below 100 meters. If the algae lived below 100 meters, they would be eaten by animals. In the Chesapeake Bay, many different organisms are threatened by over fishing, pollution, or habitat destruction.