Vestigial organs are organs that we don't use but maybe our ancestor use this organ and the organ will evolve into smaller. Example : Appendix, Hair in chest, canine.
This theory come from J.B Lamarck
False, only some . Hope this helps !
In humans<span>, each cell normally contains </span>23 pairs of chromosomes<span>, for a total of 46. Twenty-two of these </span>pairs<span>, called autosomes, look the same in both males and females. The 23rd </span>pair<span>, the sex </span>chromosomes<span>, differ between males and females.</span>
