Why is a ring of life more appropriate to describe the relationship between archaea bacteria and eukaryotes than a tree of life

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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1. is geographic distribution

2 is increasing complexity

3 is transitional forms

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

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