Though evolutionary changes are largely cast as a good thing, the parts they play can be misleading. As was the case with some African cichlid fish, evolving to have an advantage in consumption -- pharyngeal jaws in...
It’s very uncommon for vertebrates to reproduce without a mate. But it does happen. It is so rare, however, that it’s almost never observed in a laboratory.
Common thinking says that genetic codes are fixed throughout life, but this is not really the case, according to the results of a new study focusing on the roles that genes play in fish dominance.