Answer: Aristotle's and Linnaeus's classification systems both divided all life into two groups: plant and animal.
Answer:
the heart it is because the heart beats and it goes up and down
The factor that has the most greatest importance in determining the characteristics of an aquatic ecosystem will be water depth. The depth will determine the sunlight that the ecosystem will get. The answer will be B.
By common logic you know that water has pH=7
When you add water to something that is acidic, for example you add water to vinegar, you make it less acidic. So the pH from 2 will be higher for instance 3 or 4 or 5 etc.
This happens because pH=-log[H3O+]
