Vestigial structures do not harm the organism. Nature selects against only harmful traits.
Vestigial structures are remnants of features that were once functional in an organism's ancestors but are no longer needed in the current environment. Natural selection does not actively remove these structures because they do not typically have a negative impact on an organism's fitness. Since they do not hinder survival or reproduction, they are not actively selected against.
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.
The population has not reached carrying compacity is correct on apex
Bacteria and dead cells are removed from lymph within lymph nodes, which are small bean-shaped structures located along the lymphatic vessels. Lymph nodes contain immune cells that help filter and eliminate these harmful substances from the lymph fluid before it is returned to the blood circulation.
Vestigial structures do not harm the organism. Nature selects against only harmful traits.
Vestigial structures are remnants of features that were once functional in an organism's ancestors but are no longer needed in the current environment. Natural selection does not actively remove these structures because they do not typically have a negative impact on an organism's fitness. Since they do not hinder survival or reproduction, they are not actively selected against.
Nature selects against only harmful traits
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.
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.
Something that is attached to the structure that can be removed.
The large feathery structures are the gills.
the tail
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.
Genes can be removed from the gene pool through natural selection, genetic drift, and gene flow. Natural selection removes genes that are less advantageous for survival and reproduction over time. Genetic drift is the random change in gene frequency in a population due to chance events. Gene flow occurs when individuals migrate between populations and bring new genetic material, potentially diluting or replacing existing genes.
The natural resources in the arctic are not being removed very quickly because of the permafrost. The permafrost is hard to dig up, pretty much too hard. Because of that, the natural recourses resources are not being removed very quickly!
What are the main structures you could have observed if you had removed the exoskeleton of the abdomen? What are the main structures you could have observed if you had removed the exoskeleton of the abdomen? dunno