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They went from simple colonies of cells (such as some groupings of bacteria) to multicellular creatures with some cell specialisation.

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What evolutionary innovation is associated with the simplest animals the sponges?

multicellularity ------------------------------------------------ Sponges are simple aggregations of single cells which come together for mutual benefit. If you liquidise a sponge, the cells it is made form will come together again to reform the sponge. Thus sponges (or something like them) were probably the first step in the evolution of multi-cellular organisms.


What evolutionary innovation is associated with the simplest animals in sponges?

multicellularity ------------------------------------------------ Sponges are simple aggregations of single cells which come together for mutual benefit. If you liquidise a sponge, the cells it is made form will come together again to reform the sponge. Thus sponges (or something like them) were probably the first step in the evolution of multi-cellular organisms.


Where can clues in the evolutionary relationships of animals be found?

Clues can be found out about the evolutionary relationships of animals by studying fossil records.


Did plants come before animals in the evolutionary timeline?

Yes, plants evolved before animals in the evolutionary timeline.


What involves the application of evolutionary principles to the behavior of animals and humans?

The behavior of animals and humans can be studied with an evolutionary lens. This allows scientists to determine why certain behaviors were beneficial in evolutionary terms.


Are animals considered monophyletic or paraphyletic in the field of evolutionary biology?

In the field of evolutionary biology, animals are considered monophyletic, meaning they all share a common ancestor and form a single evolutionary group.


What is the evolutionary significance of cnidarian versus porifera life forms?

The evolutionary significance of Cnidarians is that they were the first animals to move. As for Porifera, they were the first animals on Earth.


What are some animals in New Mexico that have shown evolutionary changes?

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Why during the evolutionary history of animals has there been an tendency for maximum body size to increase?

during the Prehistoric or the era of the dinosaur was evolutionary history of animals has there been an tendency for maximum body size to increase.


Why are sponges considered to be an evolutionary dead end?

No other animals are believed to have evolved from sponges, thus they win the title of "an evolutionary dead end."


Which kingdom of organisms is most closely related to fungi?

Fungi are most closely related to animals in the evolutionary tree of life. Both fungi and animals are classified under the Opisthokont kingdom, which indicates their shared ancestry and evolutionary history.


What type of fish is thought to be the evolutionary to land animals?

lobe-finned fish