It is a mode of natural selection where an extreme phenotype is favored by the other phenotypes causing the allele frequency to shift over time in the direction of that phenotype
When a lineage splits into multiple line of descents, then, it leads to speciation. It is a process by which a single population evolves into different species. The process of speciation leads to the development of two or more species as the lineages are splitted. These two evolved species are genetically independent.
Hence, the blank can be filled with 'speciation'.
Mature DNA cells do NOT contain DNA.
Answer:
Prophase
The replicated chromosomes thicken and become visible as separate chromosomes during prophase stage of mitosis. :)
Alternating sugar and phosphate molecules also 4 types of nitrogen bases
