Chordates are animals with backbones. Animal groups in the chordate phylum include fish, amphibians, reptiles, birds and mammals. Animals with backbones are the most highly evolved groups of animals, the most complex and complicated. They have interior skeletons and have bilateral symmetry.
The thesis is the point your paper is trying to prove. Here are some essential points to keep in mind about the thesis, starting with a definition. Thesis (plural: theses, pronounced THEES-eez): The point that an essay is trying to prove. Also known as the claim or argument. Everything in a persuasive essay relates to the thesis, either as evidence, explanation, elaboration or rebuttal of alternative claims. Think of the thesis as the spine of your paper. Just as all the parts of your body are connected to the spine, and without the spine your body could not stand, so too in your essay all parts must be connected to the thesis, and without the thesis the essay cannot stand.
What is a thesis? Your thesis is not your dissertation. Neither is it a one liner about what you are doing. Your thesis is a position or proposition that a person (as a candidate for scholastic honors) advances and offers to maintain by argument. [Webster's 7th New Collegiate Dictionary].