Invasive species depopulating Native species.
Answer: Respiratory gases(Oxygen)
Explanation:
The essential role of cadio vascular system is to supply blood; containig metabolites (glucose,amino acid, fatty acid and glycerol) and gases expecially Oxygen,needed for combustion of these nutrients(metabolites) in mitochondrial of cells (cellular Respiration) to generate ATPs for biochemical activities of the body.
Ferns don’t have to be in a tropical setting, but they can.
It’s a bad question.
You would look for the chemical and physical properties because by identifying what properties those metals fit into it is easier to compare and contrast what metal they are
