Answer:
DNA changes in a gene are called mutations. ... The environment can also cause DNA mutations. Sunlight, cigarette smoke, and radiation are all known to cause changes to our DNA. These are also random and can happen anywhere in the DNA sequence.
Biological diversity. It studies all living organisms and how they interact with each other and their environment.
Astronomy can best be described as a "<span>a. study of objects beyond earths atmosphere", although the subject of astronomy can be much more complicated. </span>
C . on or in the ocean bottom
