OCS 1005 Chapter : Marine Invertebrates And Marine Vertebrates Lerning Objectives
15 Mar 2019
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Marine invertabrates: you should be able to define invertebrates and list the key characteristics of invertebrates. Invertebrates are animals that have no backbone: soft-bodied animals with no rigid internal structures. Invertebrates: soft bodied animals with no rigid internal structures, 90% of all living and fossil animals are invertebrates, highly varied group covering many phyla, you should know what the simplest, multicellular animals are and some key characteristics. Sponges, phylum porifera are the simplest multicellular animals. Early in earth"s history there was a great deal of carbon dioxide but not oxygen. Name a few examples of animals from this group. The key advancement was to have specialized tissues. This allows the animal to have coordinated activities like swimming, feeding, and responding to external stimuli. If you were to divide the animal into different sections like a pie, all segments would be a mirror image of the other.
