I would say that "any more" has to do with quantity (would you like any more bread?), and "any longer" with time or duration (we are not friends any longer, although I believe it would be also correct to say "any more" in this case).
A branch point on a phylogenetic tree is a separation point, from where a lineage is evolved into a new different lineage. The basal taxon is the unbranched lineages which evolved from the root.
Answer:
The correct answers are
A.Layer C is younger than layer A.
B. Layer B is younger than layer A but older than layer D.
Explanation:
just took the test and got it right
