Awake! January 2014 - Which 'basic' kind are humans?

TD

More recently it is being confirmed, and in some cases rewritten, by comparative genetics.

Yes, It's made for some surprising changes in botanical classification.
cofty

I'm finding some of the names used to divide the animal kingdom to be challenging.

My current favourite is the big division between protostomes and deutrostomes - mouth first and mouth second.

It occurred to me that at the most basic every creature is mouth-intestine-anus.

Everything else is secondary.

ETA - Quiz question; What creature has no digestive system?
jgnat

Tapeworm?

How about all the "kinds" that do not exist today, recorded in the Cambrian layer?

http://www.burgess-shale.bc.ca/discover-burgess-shale/burgess-shale-fossils-and-their-importance

How about all the "kinds" that did not exist then?
cofty

Tapeworm? - Jgant

Once anchored to the host's intestinal wall, the tapeworm absorbs nutrients through its skin as the food being digested by the host flows past it and it begins to grow a long tail, with each segment containing an independent digestive system and reproductive tract http://en.wikipedia.org/wiki/Cestoda
jgnat

Awwww. Snap!

It's gotta be some sort of parasite.
cofty

Clue - It applies only to the adult stage of the life cycle
jgnat

Cicada?
adamah

And where exactly does the fearsome crocoduck fit in on that chart?
cofty

Cicada?

You are getting close.
nicolaou

Sponges?