Layers of fossils in pillars, the rock covering them is dated and we get an exact time of each layer.
The main reason for the species extinction is for the ecological changes.
Answer:
Soap2day
Explanation:
It’s a website with free movies
<span>maintains a constant INTERNAL environment
so other options included internal variable and external environment. but its internal and environment</span>
In order for plants to produce energy and maintain cellular function, their cells undergo the highly intricate process of photosynthesis. Critical in this process is the stoma. Stomata (multiple stoma) are located on the outermost cellular layer of leaves, stems, and other plant parts. An open stoma facilitates the process of photosynthesis in three ways. First, it allows light to enter the intercellular matter and trigger the process. Second, it allows for the uptake of carbon dioxide, a key chemical in producing plant energy. Third, it allows for oxygen to be expelled into the outside environment, a byproduct of photosynthesis that is no longer needed by the cell.
