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Can Someone Help Me Pick The Topics For My Essay?


I don’t want anyone to do it for me, I just want to know which three are the easiest to find information about. Thank you! =)
Pick any three of the seven choices and compare and contrast the nervous system, circulatory system and locomotion of these groups as it relates to the environment they are found in. Be sure to discuss what structures are characteristic of the phylum or class and how these structures suit the environment they are found in. Discuss the nervous system beyond the realm of its complexity- discuss the structures associated with how each organism senses its environment and is able to respond to it. Discuss the circulatory system found in each phylum or class, and what structures, behaviors, and/or adaptations are involved in their regulating oxygen, waste removal, osmoregulation, etc. Also discuss the type of locomotion in each group and how it suits the niche of the organism. Be sure to include what kingdom each phylum you choose belongs to. Use species-specific examples if you like.
Pick any three of the following:
Phylum Ciliophora
Division Euglenophyta
Phylum Porifera, Class Calcarea
Phylum Mollusca, Class Cephalopoda
Phylum Arthropoda, Subphylum Chelicerata, Class Arachnida
Phylum Echinodermata, Class Stelleroidea
Phylum Chordata, Subphylum Vertebrata, Class Amphibia

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