From which of the Earth's layers does the magma come?

Magma comes from Earth's Mantle.

Explanation:

Magma comes from Earth's mantle, the thick layer between Earth's crust and outer core.

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation:

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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