Which two are examples of mechanical weathering mentioned in the article? A Freeze thaw, salt wedging
B Freeze thaw, river erosion
C. Freeze thaw, acid rain
D River erosion, salt wedging ​

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:

feral cats are estimated to eat tens of millions of native animals each night in australia

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.