Plants and animals are pH sensitive. The growth of plants is dependent on the nature of the soil. If the pH of the soil is greater than 7 and is alkaline, then the plants cannot grow in the soil.
When it comes to animals, the pH level in their stomach needs to be maintained. For smooth digestion, certain level of pH needs to be maintained. If the level gets disturbed problems such as acidity can be faced.
Therefore, it can be concluded that small changes in the pH level can affect the metabolic functioning of plants as well as animals.