Firstly, plants cannot grow in absolute darkness. In most instance the minimum light that indoor and outdoor plants will tolerate is between 450 and 600 lux. This varies from species to species.
In...
Humans take in oxygen and use it for their blood. In turn, they give off carbon dioxide. Plants do the exact opposite. They take in carbon dioxide, use it to make food inside of them, and then give...
Ozone is toxic to plants, and plants exposed to ozone have stunted growth. Ozone directly affects the breathing structures in plants, much as it does for lung tissue. If they cannot respire correctly...
They are not really different. Plants grown from seed, unless a true species can be variable. A plant grown from a cutting will be exactly like it's parent.