All things must be different and the same. the reason I think this is because no certain evolution change has made the subject stay the same or make it completely different.
the alleles has made changes in the DNA structure therefore causing some sort of "evolution". to make a more specific example is in the ancient crocodiles, when they lived they had different environmental changes and how that effected them. somewhere the DNA structure was changed and made them what they are today.
all in all the evolution in this unit has shown what happens during the process and how it starts.
now this hasnt been graded but this should get you a decent start.
-A-A-A-T-G-C- because only one base pair is altered by the mutation
they cannot happen at the same time
Cell divison is necessary to replace cells that are worn and aging. Cells do not have an indefinite life span. Fo example, the life span of a red blood cell is about 120 days.
