The reading claims that a specific kinds of animals which called agnostids extinct aprroximately 450 million years ago and we don't have any idea about their life. The author brings up some theories for that. However, the lecturer finds all of the ideas dubious and presents some evidence to refute them all.
Firstly, the author argues that those animals hunted smaller animals like other types of primitive arthropods. Conversely, the lecturer brings up the idea that those kinds of primitive arthropods had well developed eye to follow their preys but, agnostids didn't facilitae from this ablitity and this animals were blind.
Furthermore, the reading passage holds the view that agnostids were seafloor dwellers and said that this characteristic
Firstly, the author argues that those animals hunted smaller animals like other types of primitive arthropods. Conversely, the lecturer brings up the idea that those kinds of primitive arthropods had well developed eye to follow their preys but, agnostids didn't facilitae from this ablitity and this animals were blind.
Furthermore, the reading passage holds the view that agnostids were seafloor dwellers and said that this characteristic