Some time between 700 and 600 million years ago,
early multicellular animals appear to have burrowed and grazed the mats to destruction — showing that humans are by no means the first to overexploit their environment.
Not exact matches
The two possible solutions have very different consequences for our understanding of central aspects of the
early evolution of
multicellular animals (Metazoa), such as the origins of nervous systems, tissues and organs.
Here he developed a keen interest in the
early evolutionary history of
multicellular animal life.
Although the oldest
animal fossils date back 544 million years, most evolutionists agree that complex,
multicellular creatures probably appeared at least 150 million years
earlier than that.
Ruiz - Trillo and his team sequenced the Capsaspora genome in an
earlier project and discovered that the amoeba contained many genes that, in
animals, are related to
multicellular functions.
According to this view,
early sponges sit at the base of the
animal tree of life, which then forks into four other groups: comb jellies, jellyfish, primitive
multicellular animals called placazoa, and another group of
early symmetrical
animals that led to worms, insects, and ultimately us (bilaterians).