The Black-footed Rock wallaby and all other species of rock-wallaby are the closest living relatives of the Yellow-footed Rock wallaby.
The Okapi is the closest living relative to the giraffe however other species may be included in the formation but they are yet to be discovered.
The scientific name of the Golden Toad is Bufo Incilius periglenes. That means that it belongs to the genus Bufo, and the subgenus Incilius (A genus is the smallest group above species, and a subgenus is a division of a genus). Therefor, its closest living relative would be a member of the genus Bufo, and the subgenus Incilius. There are 32 surviving members of the subgenus Incilius, therefor any one of these could be the closest living relative of the Golden Toad.
The closest living relative of penguins is thought to be the petrel bird, which is also a seabird known for its physical adaptations for life in the ocean. Both penguins and petrels share certain evolutionary traits due to their adaptations to similar aquatic environments.
The tiger. In fact the two species are still capable of inter-breeding to produce offspring although of quetionable fertility. They are called Ligers or Tigions depending on whether the male is a lion or a tiger.
The closest living relative of the Kangaroo that fits the description provided is the wallaby. Wallabies also belong to the same family as kangaroos (Macropodidae) and are native to Australia and surrounding areas. In North America, a similar species that consumes grubs, eggs, flowers, and fruits and reproduces sexually is the Virginia opossum.
The closest living relative to humans is the chimpanzee.
The Bengal tiger is the tiger that is the closest living relative of the Amur tiger.
The walrus is the closest living relative to the manatee.
dogs
warthogs
The Okapi is the closest living relative to the giraffe however other species may be included in the formation but they are yet to be discovered.
Birds are the closest living relatives of spinosaurus and all past dinosaurs.
Chimpanzees are humans' closest living relatives.
toads
The dragonfly's closest relative is the damselfly. === === === ===
megalodon
A scallop