How Can One Species Turn Into Another Species? New species arise through a process called speciation. In speciation, an ancestral species splits into two or more descendant species that are genetically different from one another and can no longer interbreed. Can species evolve into new species? Speciation is the evolutionary process by which populations evolve
What Are Molecular Clocks Based On? Molecular clocks are based on two key biological processes that are the source of all heritable variation: mutation and recombination. Mutations are changes to the letters of DNA’s genetic code – for instance, a nucleotide Guanine (G) becomes a Thymine (T). What assumptions are molecular clocks based on? The
What Is The Difference Between Darwinian And Lamarckian Theories Of Evolution? Darwin and Lamarck’s theories were very different. Darwin theory said that organisms get helpful variation before changes in the environment. … Lamarck theory said that organisms got helpful variation after a change in the environment. He said that giraffes got long necks when the
What Are The Characteristics Of A Good Molecular Clock? An ideal molecular clock has a number of features: rate constancy through time, rate homogeneity across lineages, taxonomic breadth and applicability, and accessibility of the data. Characters that have evolved at a relatively constant rate are the most suitable for molecular clocks. What are molecular clocks