<span>Chromosomes, found in the cell nucleus, contain many genes. A gene is a section of </span>DNA<span>, which carries coding for a particular protein. Different genes control the development of different characteristics of an organism. Many genes are needed to carry all the genetic information for a whole organism.</span>
Answer:
it protects aquatic life from changes in air temperature
Explanation:
<h3>To round to a significant figure:</h3>
- look at the first non-zero digit if rounding to one significant figure.
- look at the digit after the first non-zero digit if rounding to two significant figures.
- draw a vertical line after the place value digit that is required.
- look at the next digit.
