6) D. Populations evolve as natural selection results in a change in the frequency of alleles within the population over time.
Our current understanding about how species evolve is natural selection produces adaptations vital to the survival of organisms.
7) B. The relative frequency of the mutation will increase as time passes.
The information provided makes it clear that the mutation is an advantageous mutation; according to the theory of natural selection, since the mutation is beneficial to the bacteria, those with the mutation will survive and reproduce more, passing on the mutation. This way, the frequency of the mutation will increase.
Answer: An insertion mutation occurs when an extra nucleotide is added to the DNA strand during replication. This can happen when the replicating strand "slips," or wrinkles, which allows the extra nucleotide to be incorporated.
The reason its A is because a Dip-Slip is inclined fractures where the blocks have mostly shifted vertically. If the rock mass above an inclined fault moves down, the fault is termed normal, whereas if the rock above the fault moves up, the fault is termed reverse.
