To get tissues, organs and organ-systems cells need to work together. Being multi-cellular (or many celled) provides many advantages for an organism, but when and why did cells start doing this? See what Dr. Joe has to say below.
Thursday, September 29, 2016
Biological Levels (Hierarchy)
Why do we group life into levels (or a hierarchy)? Well life is grouped into levels, but some organisms do not exist in all levels. Consider single-celled (unicellular) organisms which lack tissues, organs and organ systems. Watch the Amoeba Sisters video to understand these levels better.
To get tissues, organs and organ-systems cells need to work together. Being multi-cellular (or many celled) provides many advantages for an organism, but when and why did cells start doing this? See what Dr. Joe has to say below.
To get tissues, organs and organ-systems cells need to work together. Being multi-cellular (or many celled) provides many advantages for an organism, but when and why did cells start doing this? See what Dr. Joe has to say below.
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