Any substance that triggers an immune response is an antigen(s).
The medication would be the controlled variable, the factor that remains constant.
All of those are similar to each other because they are all weeds, or in other words they are all different types of grasses.
Answer:
genetic information, energy, soil
Explanation:
Germination is the term used to describe the set of steps that allow the development of an embryo within the seed of the plant. The development of this ambrion will result in the emergence of a seedling that will develop and form a very important plant for the ecosystem. In short, germination is the process of transforming the seed into a new plant.
In order for this to occur, the seed needs some factors that degrade its entire development. These factors are genetic information, energy and soil
