Mutation can be both beneficial and harmful.
A very common beneficial mutation is camouflage and natural selection. The organism will acquire the change and pass it on to their offspring.
A harmful mutation can be diseases or a common harmful mutation, Down syndrome. Which gives a person an extra chromosome.
Dry it means it is very dry
I'm not completely certain but I believe that the answer is dehydration. When this occurs, monosaccarides are joined and water, or H2O, is a product of this.
The dark plumage help them keep warm by absorbing energy from the sun
Because the mother cell has divided to give two new daughter cells.
