Sentences with phrase «branching animal lineage»
Not exact matches
For years, evolutionary biologists have believed that the sedentary sponge — that mushy aquatic creature so rudimentary it doesn't even have tissues or nerves — branched off the animal family tree before any other lineage, making it a relic of the very first animal on earth.
http://discovermagazine.com/
Sponges are considered to lie on the earliest branching lineage in the animal kingdom, a sister group of the «true» animals or eumetazoa.