The lower the fossil the older it is.
So, if two fossils were in different layers of sedimentary rock, the lowest fossil is older.
Increased carbon dioxide levels
This is because the plant takes in Carbon Dioxide to use it's carbons to help make energy. So if there is more carbon dioxide, there is more photosynthesis going on in the plant since carbon is also in the sugar the plant uses.
Answer:
During photosynthesis, plants produce glucose from simple inorganic molecules - carbon dioxide and water - using light.
Explanation:
Examples of photosynthetic organisms include:
Plants.
Algae (Diatoms, Phytoplankton, Green Algae)
Euglena.
Bacteria (Cyanobacteria and Anoxygenic Photosynthetic Bacteria)
