Divergence of crustal plates. I could be wrong though and if I am my bad :))
The answer is A. The mutation of the gene was a beneficial
one. It happened in a few individuals
and increased their survival rate. The mutation
was also inheritable hence was passed down generations. The new gene probably altered a protein involved in
metabolism. There are two other types of mutations;
deleterious and neutral.
They are less brighter because of the lesser amount of heat in them. In fact, sunspots are identified as areas that don't subject to heat very much, and are shown as dark spots because it's not hot enough to glow the yellowish orange color we usually see
Hope this helped!
Thanks!
~Steve
Both the mushroom and the gecko are heterotrophs: they need to acquire their food from other sources. The tree, on the other hand, is an autotroph--it gains most of its nutritional needs through photosynthesis.
The life-form during the Precambrian time was cyanobacteria.