Germination
No, I have not encountered a light green mushroom growing in my plant.
Give the plant proper lighting (preferably sunlight) and water. Make sure the plant you are growing is also a green plant.
There really isn't enough information to answer your question. However, if you mean a green plant and CO2 gas then you generally get a faster growing plant.
The type of plant that has red and green leaves is called a coleus plant.
Phototropism
A tall plant with red flowers and green leaves is called a hibiscus.
The green pigment in plants are called chlorophyll.
yes
harvest
It is called the seedling.
IT is called "Chlorophyll" and is found in the "Chloroplasts".
Seed