Atavistic structures are structures that appear on a living thing, but are not normal for its species. One of those would be a whale born with hind legs. Another would be a human born with a short tail-like structure.
Humans: the appendix, wisdom teeth, and ear muscles are examples of vestigial structures. Whales: hip bones and hind limb remnants are vestigial structures in whales. Pythons: pelvic spurs, remnants of hind limbs, are vestigial structures in pythons.
Scientists have discovered that whales' ancestors had vestigial hind limbs, now absent in modern whales. These vestiges are important evidence of a shared ancestry with four-legged land animals. The presence of these anatomical remnants suggests an evolutionary link between modern whales and four-legged animals from a common ancestor.
There is no answer for this question because it does not make any sense.
Bones of whale ancestors showed that whales had hip bones along with legs and hind feet.
Bones of whale ancestors showed that whales had hip bones along with legs and hind feet.
They are examples of vestigial structures: structures that appear to be useless but once most probably had a function
Bones of whale ancestors showed that whales had hip bones along with legs and hind feet.
Yes, in fact all animals that do not have hind legs today did have hind legs thousands- millions of years ago. It is believed that humans will someday no longer have hind legs, the way evolution is going scientists predict that snakes and whales and legless ducks will one day grow legs whereas, humans will not. Leaving us at the bottom of the food chain once again.
Cetaceans are large aquatic carnivorous mammals with fin-like forelimbs, and no hind limbs, like: whales, dolphins, porpoises, and narwhals!
Fossils of prokaryotes have been found in rocks about 3.5 billion years of age and this data fits with the molecular and cellular evidence that prokaryotes are the oldest form of life! An example would be that whales long ago had hind leg bones, but as they evolved, whales began living without hind limbs.
Yes they do. They are detached from the vertebral column and float free though.
The main structures of the brain are the cerebrum (the fore brain), the cerebellum (the hind brain), the brain stem.