Basically his experiments, which scientists came to know only after he was dead. His experiments, and of course, the result of this experiments that served as a proof of what Mendel afirmed, where one of the most importnat factors that made his ideas accepted.
They where also accepted because he discovered DNA, the basic laws of inheritance and chromossomes.
Hope it helped,
Happy homework/ study/ exam!
Birds-Migratory
Freshwater Fish-local endemic
Large predators-sparse distribution
