The answer is the letter b
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:
Cerebrum is the largest and most complex region.
Answer:
They require the cleanest water for survival as well as high levels of dissolved oxygen. In particular, mayflies (Ephemeroptera), stoneflies (Plecoptera) and caddisflies (Trichoptera) are the most sensitive to changes in water quality
Explanation:
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