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It is unknown what caused such evolution to occur. We do know that they evolved from some sort of lungfish. The ability for a fish to take oxygen from the air makes it easier to survive in water without much dissolved oxygen. Possible transitional fossils show animals with leg-like fins that could not support the animal's weight on land, but might have been useful for crawling along the bottoms of shallow lakes. The ability for a similar animal with stronger limbs to crawl onto land would have allowed them to escape predators and move to new bodies of water if conditions become unsuitable.
What else can I help you with?
Are all tetrapods air-breathers?
Yes.
How is homologous structures an example of evolution?
Though the forelimb of your cat or dog does not look much like your arms these are homologous structures that are almost identical bone for bone. This shows the common ancestry of all tetrapods and the closer common ancestry of you and your mammal pets.
Are curassows tetrapods?
Yes, curassows are tetrapods. Tetrapods are vertebrate animals with four limbs, and curassows fit this description as they belong to the order Galliformes, which includes birds with four limbs adapted for walking and perching.
What are tetrapods that live on land but still depend on water to survive and reproduce?
Amphibians
What term describe changes that occur with species?
The term that describes changes that occur with species over time is "evolution." Evolution refers to the process through which populations of organisms undergo genetic changes across generations, leading to adaptations and the emergence of new species. This process is driven by mechanisms such as natural selection, mutation, genetic drift, and gene flow.
What did the ancestor of all modern tetrapods look like?
lizard The common ancestor of all modern tetrapods looked like a fish that had nubs the became limbs through evolution.
Which evolutionary innovation was most significant in helping tetrapods move to dry terrestrial environments?
The evolution of limbs with digits was the most significant innovation that helped tetrapods move onto dry terrestrial environments. This adaptation allowed for weight support, better mobility, and the ability to navigate various terrains.
Are sharks tetrapods?
No, sharks are not tetrapods. Tetrapods are a group of vertebrates that includes amphibians, reptiles, birds, and mammals, characterized by having four limbs. Sharks, being cartilaginous fish, belong to the class Chondrichthyes and have fins instead of limbs. Thus, they are classified as fish and not tetrapods.
Does evolution occur in individuals or in population?
Evolution occurs in population not in an individual.
Did evolution occur in the permian period?
Yes. Evolution ocurred in all geologic periods.
Why did evolution not occur in down syndrome?
Down Syndrome is a the addition of an extra chromosome and not really related to evolution. It is more of a genetic mutation that causes this event to occur.
What are some draw backs of selective breeding?
You do not allow evolution to occur, for you are evolution in selective breeding.
How is variation related to evolution?
The more variation there is in a group of specimens, the more evolution can occur between them.
How do variations occur?
During evolution, chromosomal cariation in structure cannot occur due to
For a mutation to affect evolution it must occur in?
For a mutation to affect evolution, it must occur in the DNA of reproductive cells (sperm or egg cells) so that it can be passed on to offspring. Mutations that occur in somatic cells (non-reproductive cells) do not directly impact evolution as they are not inherited by future generations.
When will convergent evolution occur?
It already has in some instances
What is a mechanism by which evolution can occur?
Selective Breeding of course!
