Unformatted text preview: ix. After Gastrulation, the gastrula is formed. x. The larva is sexually undeveloped and distinct from the adult form of the animal. xi. Larva undergoes metamorphosis. xii. The animal development is regulated by control genes called Hox genes. B. Two Views of Animal Diversity i. There are 35 Phyla of animals b. Biology as an ongoing process i. Phylogenetic trees are not permanent and are an example of how Biology is an ongoing process. ii. New technologies help plot phylogenetic trees iii. The more testing a hypothesis becomes, the more credible it becomes. c....
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