The violet gland
The violet gland or supracaudal gland is a gland located on the upper surface of the tail of certain mammals, including European badgers and canids such as foxes, wolv
Aphids, carotenoids and photoheterotrophy
Some species of aphids have acquired the ability to synthesise red carotenoids by horizontal gene transfer from fungi. They are the only animals other than
Rennet
For the apple varieties, see Reinette Rennet is a complex set of enzymes produced in the stomachs of ruminant mammals. Chymosin, its ke