Below is a food chain from an ecosystem. ect
fly – frog – snake
-
alligator
The arrows indicate the direction of the flow of
A. energy
B. water.
C. oxygen.
D. carbon dioxide.

lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds