A mutation could do that.
What are three freshwater environments?
1(Rivers
2(Lakes
3(Streams
<span>The spinal cord is the foremost road for message attaching the brain and external nervous system.</span>
The body's spinal cord is preserved through the osseous spinal string pointed to the left side. The spinal string is produced of osseins named vertebrae / the backbone. Despite the spinal string is slightly adjustable, few of the vertebrae in the inferior segment of the spinal string displays wick.
Answer:
D)They ensure valid results.
Explanation: