2. to keep the body's internal environment in balance
upwelling cold sinks, warm rise. suponification
<span>Survival of at least a few members of a population after a major environmental change is most dependent on 3) variations in many different traits in many individuals in the population.
Variation is important for a species which wants to survive huge changes in the environment. If they cannot adapt to their new surroundings, they won't be able to survive. This is where variation comes in - it enables a species to develop new techniques and traits necessary for survival.
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Firstly sunlight is needed for the chloroplast to get it activated by the photons in solar energy so that light dependent reactions take place. And then the raw materials like minerals,water,sunlight,etc... Are needed for the process photosynthesis.
