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This exciting new poster is the first time the animal
kingdom has ever been shown through the development of
physical characteristics. It graphically demonstrates how
the main branches of the new cladistic classification system
were established. Animals differ from plants in that they
have at least two cell layers; plants have only one. Metazoa
is the biological name for the animal kingdom. It
constitutes a “clade,” which is a group of organisms that
share a common physical characteristic. In this case, it is
more than one cell layer. The first significant physical
development was the addition of a third cell layer. All
animals have them, except the sponges and jellyfish. Thus
each of these three groups becomes a clade. The poster
continues through every major step of physical development.
It illustrates and explains the new development and then
shows representative species from resulting clades.
This poster is largely devoted to the invertebrates and is
extremely helpful in showing how various groups are related
to one another. It makes it easy to understand their common
physical characteristics and their differences. The
vertebrates are shown in lower right corner. The complexity
of their development resulted in them being treated
separately in Milestones of Vertebrate Evolution. |
Triploblastic Layer
This third cell layer permitted the development of a more
complex body.
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Standard poster is large 24" x
36" size that fits standard frames. Printed on heavy, acid-free
paper using non-fade inks, then coated to provide satin finish and
provide protection from scratching. Laminated poster is completely encapsulated in
heavy 3 mil
plastic for long life. |
| Standard Poster: |
No. GS410-DS |
Only $9.95 |
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| Laminated
Poster: |
No. GS410-DL |
Only $14.95 |
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