Answer:
1. Earth's ozone layer is responsible for absorbing infrared and ultraviolet rays from the sun.
2. Changes in the composition of the atmosphere have caused gradual changes in earth's climate, causing changes in plant and animal life that contributed to mass extinctions.
3. Chemical chlorofluorocarbons (CFCs) have been banned and replaced with hydrochlorofluorocarbons (HCFCs).
4. Naturally occurring volcanic eruptions can produce large amounts of gases which contain sulfur. These gases accumulate in the atmosphere in the same way as man-made sulphuroxides.
Sorry, but after that I don't know.
Explanation:
It is only able to recognize part of a bacteria cell.
Hormones are called chemical
messenger of the body, which occur in various tissues where they are produce. They
occur in response to specific biochemical signals from a wide range of
regulatory systems and behavioral activities that is vital in the communication
between organs and tissues. Moreover, hormones create a cellular response by
binding to cell membrane or intercellular receptors.
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