Vestigial structures are considered evidence since scientists believe they are structures that were once used by a species ancestors but are no longer needed. They do not impair the organisms in any way, so there is no need for evolution to get rid of them. Vestigial structures are anatomical features that no longer seems to have a function or purpose in the current form of an organism of the given species. Examples are wisdom teeth, the muscles of the ear, the appendix, the tail bone among others in human.
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It is 50% homozygous recessive, and 50% heterozygous
Answer: Read Explanation
Explanation:
1)Smoking (in adolecents)
2)Smoking is a probelm emerging in young adults, with thing like Juuls and products similar to them, youths are now becoming addicted to nicotine without having a nicotine addiction in the first place. Smoking Juuls and other similar products also lead adolecents to smoke ciggaretts if not already smoking them. Smoking causes lung disease by damaging your airways and the small air sacs (found in your lungs). Ciggarette smoking in most cases will cause lung cancer.
3. The solution to teen smoking- https://www.mayoclinic.org/healthy-lifestyle/tween-and-teen-health/in-depth/teen-smoking/art-20047069
A. Ancestors of whales may once have been able to walk.
