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What else can I help you with?
What organ has no known function?
The appendix is an organ that was previously thought to have no function, but recent research suggests it may play a role in immune function.
Evidence suggests that all animals arose from single-celled ancestors.?
true
What are some theories on Appendix?
The evolutionist claimed that the appendix was not a useful organ that came from a evolution phase before the human kind. Now, Duke University immunologist William Parker and his colleagues have proposed a theory: that it's a safe house for the helpful bacteria in our gut. They've found that the appendix is especially rich in these good bacteria. And the organ's thin, narrow shape may shut out harmful infections. So this is another fail in the evolution theory.
What protists are considered to be ancestors of land plants?
Green algae, particularly charophytes, are considered to be the closest relatives and ancestors of land plants. They share many characteristics with land plants, such as similar chloroplast structure and reproductive features. This close evolutionary relationship suggests that land plants evolved from green algae.
The narrow binding sac extending from the beginning of the colon a vestigial organ with no known function?
The narrow binding sac you are referring to is the appendix. While it was once thought to be a vestigial organ with no function, research now suggests that the appendix may have a role in the immune system, specifically in maintaining gut health and promoting the growth of beneficial bacteria.
Does homologous mean that structures are similar due to having common ancestry?
homologous structures- same structure/different functions in common ancestors analogous structures-same functions/differnt structures not in common ancestors vestigial-show evolutionary history/structures that arent used anymore (i.e. human appendix/human tailbone)
How do you thank the ancestors?
If the ancestors you want to thank are living, you can write them a nice letter. If they are not living, you can go to their graves and say thanks, or you can follow whatever your religion suggests is the proper way to communicate with the dead.
How the first human born?
All of the evidence that has been accumulated suggests that there was no "first human". Humans gradually became differentiated from their ancestors.
Which continent was settled first?
The continent of Africa is believed to have been settled first by early human ancestors. Archaeological evidence suggests that human ancestors began to populate Africa around 2 million years ago.
How are vestigial structure an example of evidence evolution?
Vestigial structures are remnants of features that were functional in the ancestors of a given species but are no longer useful in the current species. This supports the idea of evolution as it suggests that species have evolved over time from ancestors with different anatomical features. The presence of vestigial structures provides evidence of common ancestry and the gradual changes that have occurred over time through the process of evolution.
What is phylogenetic constraint?
Phylogenetic Constraint is like a basic body plan. It can be modified (what evolution does) but it can't be fully changed. Vestigial features (things like the human appendix which is a remnant of our ancestors, but is no longer used) provide evidence of common ancestry and phylogenetic constraint. :)
Why do rodents have a longer appendix then humans?
It depends what theory you wish to believe. Darwin suggests that our appendix is a by product of when we were herbivorous primates and it aided our digestion of vegetable matter. If this the case then rodents would have a larger appendix in order to digest their herbivorous diet. The second theory would be that the appendix houses bacteria designed to fit gut infections so, if this is the case then perhaps rodents need greater concentrations of these bacteria due to the conditions with which they live. Not sure how useful this info is after all I'm only a bar tender!
