29 Jul LIST ALL OF THE PHYLA THAT SHOW CEPHALIZATION.
Organisms are placed in taxonomic classifications based on differences
and similarities of their traits. If you know what critical traits to
look for, it is possible to separate any animal into a taxonomic
category using a dichotomous key.
The common taxonomic categories are Domain, Kingdom, Phylum, Class,
Order, Family, Genus, and Species (Specific Epithet). We are looking at
the Phylum and Class categories in this assignment.
Assignment details:
Part 1: The assignment document contains a table with nine images. The
images are examples of nine different Animal phyla: Porifera, Cnidaria,
Nematoda, Anthropoda, Platyhelminthes, Annelida, Mollusca,
Echinodermata, and Chordata.
Download U5IP_Table.
Next, download Dichotomous Key
Use the Dichotomous Key to determine the Class category as shown for
each animal (picture), and
write the Class names under the Classification Column on the table.
List in column 2, all of the dichotomous key steps you chose when using
the key to arrive at the classification for each animal.
You will also need to list the Phylum name for each animal picture in
column one using the nine Phyla listed above. Once you have identified
the Class category for each animal using the Key, look up the correct
Phylum category using a credible reference.
Part 2: Answer the following questions as they relate to the nine phyla
in the assignment table.
Which phyla lack organs? What type of symmetry do they have?
List all of the phyla that show cephalization.
Do all organisms on the table have 3 germ layers (endoderm,
ectoderm, and mesoderm)? If not, which phyla have fewer than three germ
layers?
One phylum on the table has more species than all the others. State
the name of this phylum, and provide several different examples of
species found in this phylum.
Fish do not all have the same skeletal structure. Describe the
differences among fish from the most primitive to more advanced types of
fish.
Describe the three types of mammals based on how their young
develop.
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