30 abril 2015
For over a century, the scientific understanding of matrotrophy of an embryo developing inside a mom’s body has come from vertebrates. This process was thought to be infrequent among the other 33 or so major groups or phyla of animals. But a new major study reports that matrotrophy has evolved in at least 21 of 34 animal phyla.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/RlHU6ycAKSs/150430135001.htm
