[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
feathers as N2 excretors
Further to the suggestion that feathers are actually a pathway for the
excretion of Nitrogen products, does this imply that fur, hair, nails,
scales etc are for the same purpose? Was this considered by the proponents
of this idea, anyone?
Should we then consider that all manifestations of specialisation may be
mere secondary adaptations of the need to eliminate waste products, so that
shells on eggs are a means of ridding the body of excess calcium or other
chemicals, as are losing milk teeth, leaving your teeth in carcasses,
developing pupae cases, spinning webs, producing slime, growing shells, to
name but a few potential candidates?
But then I have to remember that arsenic, if ingested, can be found in
hair and nails. Hmmm.