Methane the most, small amount of oxygen and other gases
Answer:
Plants have two distinct stages in their lifecycle: the gametophyte stage and the sporophyte stage. After reaching maturity, the diploid sporophyte produces spores by meiosis, which in turn divide by mitosis to produce the haploid gametophyte. The new gametophyte produces gametes, and the cycle continues.
Explanation:
There are 4. Adenine, Thymine, Cytosine, and Guanine
Jan Ingenhousz discovered photosynthesis
an abnormal growth of scar tissue that is thick and out of proportion is called a keloid
