I believe the body is supplied with oxygen by the Circulatory and Respiratory system
The pH will decrease because lemon juice is very acidic meaning it would bring the pH level down to a more acidic value.
Heat causes water to evaporate into steam or water vapor.When the vapor cools it forms clouds. When those clouds get too heavy, it rains to get rid of all the water that cooled down.
Answer: An Organ System
Explanation: Vascular plants have two distinct organ systems: a shoot system, and a root system. The shoot system generally grows above ground, where it absorbs the light needed for photosynthesis. The root system, which supports the plants and absorbs water and minerals, is usually underground.
Answer:
Without decomposers, dead leaves, dead insects, and dead animals would pile up everywhere. And most importantly decomposes make vital nutrients available to an ecosystem primary producers- usually plants and algae.