Answer:
Explanation:
1.foods
2. lemons or any of acidic fruit
3.washing powder
4. arrhenius Acid
5. hydrogen
6. alkali/ base
7. water?
8. alkali
9. hydroxide
unsure about the rest sorry
A pioneer species is the first species to enter an ecosystem or to go back to an ecosystem that has been destroyed. They begin the ecological formation which eventually leads to the ecosystem prospering with many different biotic and abiotic factors. Note that pioneer species can be plants or animals.
Possibly yellow fever can't confirm for sure
The plant and animal cell
