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How are scientists able to explain vestigial structures found in whales and some snakes?
These vestigial structure, hip bones and leg bones, attest to the land dwelling ancestor of whales and the leg bearing ancestor of snakes. The inference is rather simple in whales. How else could a water swimming animal posses vestigial legs.
For light amusement read some of the creationist non explanations for these vestigial markers.
talkorigins.org
What else can I help you with?
Why are vestigal structures considered critical evidence of evolution?
Many species have vestigial structures, especially in the animal kingdom. Two good examples are the vestigial legs in whales and some snakes. This is clear evidence that whales and snakes are descended from creatures that had functional legs. This is strong evidence of evolution, since there is no other plausible explanation, religious or scientific, for vestigial structures.
The tiny hip bones and leg bones present in some snakes are an example of?
Vestigial structures. Over time, the reptiles snakes descended from gradually began to use their legs less and less and so the limbs disappeared. The hip and leg bones present are essentially useless to the snake and are "left over" from their evolution. That is what a vestigial structure is (e.g. appendix in humans is also vestigal; we don't use it).
Some snakes have vestigial legs Why is this considered evidence for evolution?
This is considered evidence for evolution because vestigial structures like legs in snakes suggest that they have evolved from ancestors that had functional legs. These structures are no longer needed for survival, but their presence supports the idea of common ancestry and evolutionary change over time.
Why is the pelvic girdle in snake is a vestigial?
The pelvic girdle in snakes is vestigial because they have lost their hind limbs during evolution. Since snakes no longer have hind limbs, the pelvic girdle serves no functional purpose and is reduced in size and structure.
How did scientists developed snakes?
They didn't snakes were around before scientists
Why do snakes have traces of leg like structures that are not used for movement?
Snakes have vestigial leg structures, such as pelvic spurs, as remnants of their evolutionary ancestors that had fully developed limbs. These structures are remnants of the genes responsible for limb development, reflecting the evolutionary transition of snakes from lizard-like ancestors. While they no longer serve a significant purpose for movement, these spurs can play a role in mating and defense. Such features illustrate how species can undergo significant anatomical changes while retaining traces of their evolutionary history.
Do snakes have a femur?
Yes. But it is a vestigial structure, meaning the ancestors needed them, but they are useless to the current creature.
What term refers to useless Oregon supposedly left over from earlier stages of evolutionary development?
The term you're looking for is "vestigial." In evolutionary biology, vestigial structures are remnants of organs or body parts that had a function in ancestral species but have lost their original purpose in the current organism. Examples include the human appendix or the hind limb bones in some snakes.
What Vestigial structures seem to lack any useful function or are at least no longer used for their original purpose?
Vestigial structures are remnants of evolutionary history that have lost their original function. Examples include the human appendix, which is thought to have once aided in the digestion of cellulose in ancestral diets, and the pelvic bones in whales and snakes, which are remnants of their land-dwelling ancestors. Another example is the wisdom teeth in humans, which were once useful for grinding down plant material but are often problematic in modern diets. These structures illustrate the process of evolution and adaptation over time.
Whales snakes and dolphins all have vestigial bones that indicate they once had hind limbs Living whales snakes and dolphins do not have hind limbs This is an ex?
There is no answer for this question because it does not make any sense.
How can you see a snakes legs?
Yes, the vestigial hind legs of boas and pythons show up as spurs on either side of the vent.
What are the nonfunctional structures of tiny pelvic girdles and legs bones within the bodies of boa contrictors?
These are the remnants of the arms and legs that the ancestors of snakes had. Over time the limbs evolved to be smaller and smaller, until now the limbs are not visible externally but can be see as vestigial bones on a radiograph.
