A new study involving biologists from Monash University Australia has found that despite
their very different ancestors, dolphins and crocodiles evolved similarly - shaped skulls to feed on similar prey.
Not exact matches
Thus the dream of today's young American man, reared in the religion of the gridiron, is not
very different from that of the young Roman legionnaire or the young medieval crusader or, more important, of the young European immigrant to the new world, his own
ancestor.
All these
very different cell types have the same
ancestor, whose descendants must acquire
different fates.
This work, conducted in Central Africa, reveals a
very different scenario: the genetic differentiation between the Pygmies and the
ancestors of the Bantus, and the demographic growth of the latter, occurred long before the advent of agriculture on the continent.
With DNA evidence as solid as that used to convict criminals, researchers can trace the shared genetic lineage of life's
different branches back to the
very base of the tree, some 4 billion years ago, when the interaction between primordial bacteria and viruses culminated in the «mother cell,» the common
ancestor of all life on Earth.
This indicates that the three types of skin appendages are homologous: the reptilian scales, the avian feathers and the mammalian hairs, despite their
very different final shapes, evolved from the scales of their reptilian common
ancestor.»
The reason, of course, is that human and dog descended from a common
ancestor, the skeletal structure of which was preserved in its essentials in both lineages, while being repurposed in its details to cope with
very different ways of life.
At autopsy, we would've used our brains over our lifetime
very differently than our
ancestors, and just as a weightlifter has
different muscles at autopsy than a swimmer, probably the analytic portions of your brain are enlarged compared to your
ancestors while the rote memory portions are not.
The sequencing of the human genome (ScienceNOW, 14 April 2003:) gave scientists major new insights into what makes us human: Although we share more than 98 % of our genetic code with the chimpanzee, natural selection has turned us into a
very different animal than the chimps, from whom our hominid
ancestors split evolutionarily some 6 million years ago (ScienceNOW, 31 August).
«The environments that most modern humans live in are
very different than the conditions our
ancestors faced 50,000 years ago,» Capra said.
On the other hand, vastly dissimilar forms of life (such as a carrot and sperm whale) may share a last common
ancestor very different from either one of them.
These proteins share a common
ancestor, but have
very different physical behaviors.
The great apes (orangutans, gorillas, chimpanzees, bonobos and humans) descended from a common
ancestor around 13 million years ago, and since then their sex chromosomes have followed
very different evolutionary paths.
But our
ancestors had a
very different experience, often going for long periods without eating.
The problem is that we live in a
very different world than our
ancestors.
The Jeep Grand Cherokee for sale today is a
very different beast to its
ancestor, but now in its fourth generation still retains much of the brash charm of the original.
What they did not change, was the basic internal workings or physiology of the wolf... As a result, the basic workings or physiology of modern dogs is no
different or
very little
different to their
ancestor the wolf... The basic environment which the modern dog requires in terms of food and exercise is exactly the same as it was (and still is) for the wolf.»
The Pembroke's northern cousin, the Cardigan Welsh Corgi, is likely the older of the two breeds, but whether the Cardigan is an
ancestor of the Pembroke, or whether the breeds evolved separately from
very different canine ancestry, is debatable.
Sure, the rituals of modern mating look
very different to those of our
ancestors.