Although the recapitulation theory in its intact form is rejected by modern scientists, there is still some validity to Ernst Haeckel's theory in that the embryos look similar during early stages of development and in time differentiate into their respective species/kingdoms. This supports the common ancestry part of evolution.
Like almost everything else in Biology, embryological development follows the pattern of nested hierarchies that we find throughout lifekind.
For instance, in all vertebrates the anus develops first - but not all of those organisms in which the anus develops first are vertebrates: vertebrates are a *subset* of deuterostomes.
This pattern of nested hierarchies persists all through biology, at all levels: it is found in individual genes and proteins, in morphological features, in behaviour, and in embryological development. And most of the features, whether genetic, behavioural, morphological or developmental, follow closely convergent patterns of nested hierarchies: whether one checks gene A or morphological feature B, one always arrives at a pattern in which apes are a subset of primates, and man is a subset of apes.
In this way, embryological development independently confirms the conclusion drawn from the other forms of these nested hierarchies.
When looking at embryos and all the stages they go through, you can see things develop that are not found on the newborn. In humans, we can see gills and even tails. The question, then is why. Looking at other animals as their embryos develop show similar patterns. The conclusion is that we have basically the same ancestors but we have branched off and are a separate species.
It does hint at common ancestry so it is "evidence" of evolution.
No, they are not evidence for ontogeny recapitulating phylogeny.
The basic textbook answer is: embryology, homologous and analogous structures, and fossils. However these are old ideas and don't stand on their own two feet, so to speak, when more research is done into them.
By examining fossils and by determining their relative and absolute ages, scientists have collected evidence that supports the theory that species changed over time.
All over the world, they are looking for missing links, creatures that were in between our ape ancestors and us today.
Part 1: Evidence from the Fossil Record Part 2: Evidence from Geographic Distribution of Living Species Part 3: Evidence from Homologous Structures and Vestigial Organs Part 4: Evidence from Embryology
biochemical evidence anatomical evidence fossils vestigial structure embryological evidence
It does hint at common ancestry so it is "evidence" of evolution.
No, they are not evidence for ontogeny recapitulating phylogeny.
vestgial structures fossils embryology also a big one is that there is a universal genetic code
i do not have any idea
DNA molecules contain the assembly instructions for every living creature. Scientists compare DNA from ancient and present creatures to identify genetic similarities among species. The genetic similarities among species is the main evidence of evolution theory.
Comparative embryology is the study of the similarities and differences in the embryos of different species. Similarities in embryos are evidence of common ancestry. All vertebrate embryos, for example, have gill slits and tails. All of the animals except for fish, lose their gills slits by adulthood. Some of them also lose their tail. In humans, the tail is reduced to the tail bone. Thus, similarities organisms share as embryos may be gone by adulthood. This is why it is valuable to compare organisms in the embryonic stage
== == Homologous provide evidence for evolution because it shows the similarities and how we evolved from the same ancestors
The basic textbook answer is: embryology, homologous and analogous structures, and fossils. However these are old ideas and don't stand on their own two feet, so to speak, when more research is done into them.
By examining fossils and by determining their relative and absolute ages, scientists have collected evidence that supports the theory that species changed over time.
fossil evidence is when scientist study fossils to figure out how the animal died how it evoled