The discovery of PCBs led to a ban on commercial fishing on the Hudson River because the chemicals were so concentrated in the flesh of fish.
Commercial fishing is the enterprise of catching fish and other seafood for commercial profit, often from wild fisheries.
<u>The cell theory:</u>
The scientist are Schleiden and Theodor Schwann stated the cell are fundamental units of plants and animal and the scientist who gave the name cell is Robert hook.
The cell theory is explains the structure and importance of the cells. Cell are divided into plant and animal cells .plant cell are primarily made up of cellulose. Cellulose are the most abundant macromolecules on the earth.
The fibre of the cellulose are made up of strong and linear fibres. The cell contains the energy flow in the DNA which is found specifically in the chromosomes and RNA found in the cell nucleus and cytoplasm.
Where is the image? Lol you forgot the main part of your question.
You take a mineral and a ceramic plate and pull the mineral across the surface of the ceramic plate. This leaves a powder residue from the mineral. The color of the powder left from rubbing the mineral on the plate, the "streak", is used to identify a mineral in combination of a chart telling you what color corresponds to what.
Answer: important because it helps make sure no one will get hurt
Explanation:
if there weren't lab rules then people could burn themselves or get severely hurt
