Answer:
Option B, Mammals and reptiles in the post-dinosaur age.
Explanation:
Adaptive radiation is mechanism through which species evolve very fast from common single ancestors. In simple words two different species are said to have evolved through adaptive radiation when they have descended from a single lineage. This is not the case with mammals and reptiles.
Generally in adaptive radiation, a species evolve when it faces new environmental challenges due to change of habitat or area. For example mammals have evolved from dinosaurs.
Hence, option B is correct
A - the spindle from the kinetochores that attaches to the chrs and pulls them towards the poles is a microfilament.
The idea that all living things are composed of cells and that all cells come from other cells defines the cell theory.
Hope this helps! :)
