Technically, there could be thousands of answers, as two animals can have the exact same hierarchy except for the species. There can not necessarily be two "closest related species".
There are, however, instances where animals of the same species have made different adaptations. Such as in one type of hummingbird living in South America, the female has a longer, more curved beak than that of the male because they feed on different flowers.
closely related species occupying the same niche.
Neutralism or naturalism is most closely related to realism.
The organism most closely related to the snake is the lizard.
The kumquat is most closely related to the poncirus fruit. They are also related to Calamondins, oranges, lemons, limes, and other kinds of citrus fruits.
Fats are the organic molecules that are most closely related to lipids. Other organic molecules include carbohydrates, proteins, and nucleic acids.
Amphibians and avians are the most closely related species to reptiles.
Horses are related to one-hoofed mammals
The taxon that includes organisms that are most closely related is a species. Organisms within the same species share a high degree of genetic similarity and can interbreed to produce fertile offspring.
Thesus monkey is the most closely related to Humans because it has the least number of differences in cytochrome c.
Choanoflagellates are the group of protists most closely related to animals, including humans. Choanoflagellates are known for their distinctive cell morphology.
Come out, appear, step into sight...
Yes, species within the same family are more closely related to each other than species within the same order. Family is a taxonomic rank that is more specific and shows a closer genetic relationship between species, while order is a broader taxonomic rank that includes multiple families.
The okapi is most closely related to the giraffe. Family Giraffidae.
If further genetic analysis were to reveal minimal genetic differences between the two species, indicating a recent common ancestor. Additionally, if hybridization between the two species were found to be common, leading to genetic blending and a lack of distinct genetic boundaries.
All species of bacteria (and several other organisms) reproduce by cloning, so two unmutated bacteria of the same species have identical DNA, and are as closely related as it is possible to be. This is true for all clones.
closely related species occupying the same niche.
Neutralism or naturalism is most closely related to realism.