<span>Humans add greatly to the carbon cycle by "</span>exhalation of carbon<span> dioxide, the burning of fossil fuels, deforestation and other poor agricultural practices."
-Reference.com</span>
Answer:
Option a. is correct
Explanation:
A mutation refers to a change in our DNA sequence which causes it to break down. It occurs due to the following reasons:
1. Due to mistakes when the DNA is copied
2. Due to environmental factors such as UV light, smoking.
3. Exposure to specific chemicals or radiation
The mechanism for reactive oxygen species to cause mutation is that bases are oxidized to a variety of different products which might pair with a different base than the original base would have.
Answer:
Adding heat causes a chemical change in the particles of the egg that makes it solid.
Explanation:
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B.plants and water
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D. Certain genes are turned on and others are turned off; this action produces adult cells that are specialized
