Evidence for evolution reveals that closely related organisms have many similar physical and genetic characteristics.
Explanation:
Closely related organisms have similar physical features and genetic sequences.
When both the physical and genetic features are similar, these organisms are referred to as homologous structure.They are similar, as their evolutionary path is the same.
Example: bones from the birds and arms of the humans, have evolved more or less similarly so they are homologous structure.
In other cases, the organisms might be closely related, but their genetic structure might have a slight change. Due to this change there might be difference in the physical structure.
Example: the chimpanzee and human have different physical structure even though their evolution have taken the same path and they are closely related.
The valence electron of the light metals are all in the range of 1 to 3.
<h3>What are Valence electron ?</h3>
Valence Electron is the number of electrons in the outer shell of an atom which participate in bond formation.
Number of Valence Electron in Boron is 3 and other light metals lighter than Boron have 1 , 2 of Lithium and Beryllium respectively,
The valence electron of the light metals are all in the range of 1 to 3.
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