Algae and nitrogen-fixing bacteria are photosynthetic organisms.
Answer:
The six most important characteristics of a civilization are cities, government, religion, social structure, writing, and arts and architecture.
Explanation:
Answer:
Explanation:
1. The classification and naming of organisms in an ordered system that is intended to indicate natural relationships, especially evolutionary relationships.
2. The science, laws, or principles of classification.
3. An ordered arrangement of groups or categories
Answer: nervous system
Explanation:
The nerves send impulses either from the brain or spinal chord for the body organs to coordinate
