You can tell how closely related organisms are by determining the lowest classification that they share. For example, organisms that share the same genus will be more closely related than organisms that share the same family.
Scientists can tell whether organisms are closely related by comparing their DNA. This will allow then to look at various traits and features so as to compare the relationship between organisms.
Taxonomy and evolution are related because the system of taxonomy is based on evolutionary and genetic differences.
dog and wolf
The plant most closely related to the ginkgo is the conifers.
I would say that Behavioral Science and Neuroscience are most closely related to Psychology.
Two organisms that are related will share the same genus name in their scientific name.
Mountain Lion and Domestic Dog, since they both belong to Animalia > Chordata > Mammalia > Carnivora
Organisms that are closely related to rabbits include; horses and turtles
DNA
Closely related: obelia jellyfish Not closely related (but still related): coral sea anemone
My weiner
The organism most closely related to the snake is the lizard.
incest.
Animals
damselflies
A clade is a group that includes an organism and all its descendants that share a common ancestor. It represents a branch on the evolutionary tree of life.
The knowledge of DNA makes for more accurate classification of organisms because the scientists can examine certain species of organisms and see if there are related or closely related to determine weather or not they can be classified in the same group or not.