Acids: hydrogen ions; bases: hydroxide ions
Answer:
True
Explanation:
The exoskeleton of the arthropods is made of chtin, that confers it a high toughness and protects the soft muscles and tissues of the arthopods. The muscles of the arthropodes are attached to the inside of the exoskeleton and they act together as one system.
Answer:
Photosynthesis
Explanation:
This is a role in the cycling of matter and flow of energy into and out of organisms. The flow of energy and cycling of matter can be traced.
