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why are structures not removed by natural selection?
Vestigial structures do not harm the organism. Nature selects against only harmful traits.
Why are vestigial structures not removed by natural selection?
Nature selects against only harmful traits
How are vestigial structures not removed by natural selection?
Yes, because vestigial structures can be harmful. For example, some humans are now born without an appendix which ensures they will not be killed via appendicitis. Having a smaller expression of a vestigial structure, like having a smaller appendix, saves on the energy wasted in maintaining an unneeded structure.
Why do molluscs have a soft body?
When they first appeared, they all had a hard shell to protect them, as they evolved and natural selection removed some of their relatives, this trait was removed and (like octopodes and squid) the shell became a vestigial structure and was removed.
Why wisdom teeth are vestigial structures?
They are not needed (we have enough teeth without them) and there is no room for them. Almost everyone needs to get them removed. They are more of a pain (literally) than they are worth.
What do they remove in an appendectomy?
The appendix is removed. The appendix is a vestigial organ found in the cecum. If it gets inflamed, it is removed and the surgery is called appendectomy.
What is vestigial side band transmission?
Vestigial sideband (VSB) is a type of amplitude modulation ( AM ) technique (sometimes called VSB-AM ) that encodes data by varying the amplitude of a single carrier frequency . Portions of one of the redundant sidebands are removed to form a vestigial sideband signal - so-called because a vestige of the sideband remains.
What is appurtenant structures?
Something that is attached to the structure that can be removed.
What are the main structures you could have observed when you removed the exoskeleton of the abdomen of a crayfish?
The large feathery structures are the gills.
Which is an example of vestigial structure?
Most of the "higher evolved" animals I can think of have a vestigial structure or two. The most common example given is of the vestigial leg structures that can be found in the back of whales. Ostriches can't fly so i think their wings are considered vestigial. Humans have a vestigial tail bone.
What are the main structures you could have absorbed when you removed the exoskeleton by a crayfish of the abdomen?
the tail
How do disease affect natural selection?
Diseases are an agent of selection. Exposed animals that survive the disease process are the ones that live to reproduce. Individuals that succumb are removed from the gene pool. The mechanism of survival could be a more robust immune system or mutation(s) that is/are inherently immune for reasons other than immune response.
