Question

In the Wallach Orientation Center (next to the Hall of Vertebrate Origins), grab a handout that discusses “how to use these halls” and details the cladograms given on the walls. By the desk, there is a large wall, with a very large, detailed cladogram discussing all vertebrates. On this cladogram are 20 numbered branch points, with specific characteristics that detail the division of the animal groups at that point (i.e., #1 is vertebral column/brain case—all organisms after this point contain a vertebral column, while those before this point do not contain a vertebral column). Spend a good amount of time looking at the different groups on the cladogram (they will all be depicted in the halls to follow), and studying the characteristics. Pick 3 characteristics on this cladogram, and discuss why they were important in the evolution of animals, and the increasing complexity of animals as they evolved. *This is the hall with the Titanosaur fossilized skeleton in it! The largest dinosaur ever discovered.

Answer 1

Answer:

• The cladogram is a branching diagram that gives us a clear idea of evolution of both animal and plant kingdom.
• The branches are divided based on the characteristics with which they are classified and evolved.
• The evolution of vertebrates mainly characterises the development of vertebral column.All vertebrates have vertebral column unlike the invertebrate animals.
• The 3 main characteristics chosen here for discussion is amniote egg,vertebral column and tetrapods.
• The evolution of vertebrates is more complex than the invertebrates.
• The amniote egg characteristic is of a greater importance in the milestone of history of vertebrates because they caused the transistion from the aquatic to terrestrial.
• This separates the amphibians and the rest of the higher evolved vertebrates.
• The next characteristic is the tetrapod which means four footed.Though all the animals lying under this category do not have four feet they still have evolved from the tetrapods.
• Humans and birds have four limbs but they use only two for walking on land.
• The tetrapod have evolved from the finned organisms that lived in water.
• The final characteristic is the vertebral column,this supports the evolution of the bony skeleton in the bony fishes till the highest level of evolution.
• The final characteristic is the vertebral column,this supports the evolution of the bony skeleton in the bony fishes till the highest level of evolution

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