Part IV: Go to Top 10 Useless Limbs (and Other Vestigial Organs) Read "Top 10 Useless Limbs (and Other Vestigial Organs)" in order to summarize information about
the vestigial organs, limbs, and behaviors.
12. According to the text, a vestigial organ is defined as
A.
Summarize its previous purpose
Identify the organ,
limb, or behavior
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•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

the tricuspid valve is present between right atrium and right ventricle