Why plants and animals are pH sensitive?
yes, plants grow best in soils with certain PH values,though optimal PH varies with the plants.Animals usually need to maintain an internal PH close to 7.
yes, pH could affect the rate of photosynthesis as most enzyme reactions are pH sensitive. However, it should be remembered that any drastic change in the pH levels of the plants leaf would most certainly kill the or damage the plant in any case - so the rate of photosynthesis then becomes really an academic issue
Animals' dung make fertilizer for the plants, enriching the soil. Animals eat plants. Animals trod on plants. Animals consume pesky insects that bother plants. Animals consume not-so pesky instects that help plants. Animals pluck plants and wave them around. Animals rub their rears in plants to mark their territory. Animals' dead bodies make fertilizer, which makes it a tad less disgusting than dung fertilizer. Animals affect the plants in many ways, fundamentally.
The pH level of different plants can be sometimes found in a pH tester. I have a chart that has probably a hundred different plants with all different suggested pH's. You can go to any search engine and type in "What is the suggest pH for [plant so and so]" and you'll find all you need about the plant's suggested pH. I hope this helped.
Marine life can live only in a narrow range of pH of about 6-7.5 which is near to neutral. pH less than 7 is actually acidic and more than 7 is basic but 6 and 7.5 is comparable. In highly acidic or basic pH marine life can't sustain. Therefore fluctuating pH is harmful for marine plants as well as animals
pH is defined only in diluted aqueous solutions. The pH scale, 0 - 14, comes from the dissociation of water (Ka = 10-7). In non-aquous solutions there is no water so this scale is not valid. The only way for direct pH measurement is using a normal pH sensitive electrode (glass, ISFET, enemal, ...) and use a selective electrode sensitive to other compounds in the solution (salts, ions, ...) wich are not affected by pH…