Summary:
Essay discusses the affect acid rain has on germination.
BACKGROUND KNOWLEDGE
A seed is formed from the ovule of a flower as a result of fertilisation, and is then dispersed from the parent plant. If the seed lands in a suitable place, it will germinate. Germination is the growth of the embryo inside the seed, eventually growing into a mature plant.
CONDITIONS NEEDED FOR GERMINATION
OXYGEN - is used for aerobic respiration, which provides the energy for many chemical changes involved in the food reserves and making the new cytoplasm and cell walls of the growing seedling.
TEMPERATURE - a rise in temperature speeds up most chemical reactions, including those taking place in living organisms. Germination, therefore occurs more rapidly at high temperatures (up to about 40 degrees centigrade). Above 45 degrees centigrade, the enzymes are denatured and the seedlings would be killed. Below 0-5 degrees centigrade, germination.....
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