Acids have a ph of 6 and below whole bases have a ph of 8 and above. If a human has to much acid in their stomach they can take a pill that will lower it back to its normal ph level
Human impact can cause population decline as previous limit are removed. Carnivores prey on animals.
If a species is said to be extinct, then that species is reduced to zero. There are none living in existence. The affects to other organisms of its extinction would depend on their value to the ecosystem. Regardless, extinction completely stops evolution of the species extinct.
A. rust because rust is the only chemical weathering listed in the answers that i know of
Hope this helps!!!!!!!!
Answer:
Cells are arranged to form different types of TISSUE, which then work to perform specific jobs for the well-being of the animal.