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:
The answer is B: the instructions for making some proteins are not specified by genes.
Answer: O Diffusion moves particles across the cell membrane from areas of high concentration to
areas of low concentration
Explanation:
A=phosphate group
B=five-carbon sugar
C=nitrogenous base
Answer:
humans cause climate change from their carbon footprint
Explanation:
