Answer AND Explanation:
The variations that Darwin regarded as raw materials for the process of evolution have been traced to changes that occur at the gene level or the chromosome and these changes are called mutations. Organisms with beneficial mutations are able to pass them on to their offspring during reproduction. Transmission of such mutations through many generations could lead to the emergence of new species. The emergence of new species requires a long time and is also affected by the rate of mutations that a particular species undergoes. This leads to evolution.
Its d. they would change color hope it help
It's a tissue. An organ is a group of different tissues which (though they perform slightly different functions), work together in the same general processes.
They live in a wide variety of moist habitats including fresh water, marine environments and the soil.
Well the whole process depends on these factors or at least some of them. WIthout them the whole system would collapse. Like in machines they all have systems that rely on each other. Now if one part broke down the whole thing is possible to collapse if the part isnt fixed or replaced.
