The passage argues that the agnostids have three possible way of living and provides details to advocate these theories. However, the professor claims that these theories are unconvincing and repudiates all three of them.
At first, the reading passage posits that the agnostids were able to swim in the open ocean and they feed on small animals. Conversely, the lecturer refutes this ratiocination by imparting that species who inhabit this region in the ocean enjoy powerful eyesight. This ability is necessary for them to track small animals to prey on, However, agnostids suffer from poor eyesight and they had impotent and sometimes blind eyes. Without a powerful eyesight, these animals should have other organs to enable them to prey in the ocean but, there is no evidence of these organs in the fossil record, Hence, this evidence rules out this theory.
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Nevertheless, the orator impugns this assertion by stating that animals who apply this style of living tend to move slow and they usually stay in a certain location. However, fossils of these species indicate that they were speard in enormous expanses of the ocean and they were able to move rapidly which contradicts with the fact that species in the seafloor occupy a certain geography. Therefore, this theory is unable to explain their style of