Answer:
Plants need water and sun to create their food source, glucose. When the plant was left in the closet it didn't have access to the sun. One of the requirements of life is that all living things need energy/have a metabolism. Without food the plant eventually died.
The beginnings of a brain first become apparent around four weeks after conception when the neural plate folds to form the neural tube
The limiting factors of an ecosystem are Habitat, Space, Resource abundance, or the reproductions<span />
The accumulation of several mutations in the main gene on the virus's surface may be able to give H7N9 the ability to spread like human flu viruses do, passing from person to person through coughing and sneezing.
