<u>C. The coastlines of South America and Africa were similar in shape, suggesting that they shared a common tectonic plate.</u>
Explanation:
As suggested by the Alfred Wegener, the plates of the South America and the African plants had a similar geologic history and thus shared a common tectonic boundary and hence validate the proof of the superclass and the drifting of the plates at various time zones.
Thus after the 1960s the plate tectonic theory came into the limelight and was heavily recognized to be fit the works of the drifting of the continental landmasses.
If crossing over does not occur then 3 auto-somes as well as one X chromosome shall always come from mother. Even if two XX were present in case of a female 50% of chromosomes shall always be contributed by the mother...
There is an increase in biodiversity due to the isolation that occurs and the adaptation that species must have to new habitat conditions. In the same way the species of each of the parts of the continent will be different from each other.
