Oligochaetes have well-developed heads chaetae for locomotion lungs for respiration a muscular foot a radula Which one of the following animals has an open circulatory system? squid earthworm mussel octopus polychaete please help with these two question

Oligochaetes have well-developed heads chaetae for locomotion lungs for respiration a muscular foot a radula Which one of the following animals has an open circulatory system? squid earthworm mussel octopus polychaete please help with these two question

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter29: Vertebrates

Section: Chapter Questions

Problem 8RQ: Members of Chondrichfhyes are thought to be descended from fishes that had. a cartilaginous skeleton...

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Concept explainers

Animal Phylogeny

Cladistics is a method of biological classification where organisms are classified based on their ancestors and their relationship with them. It is defined as the concepts and methods for determining the branching patterns of evolution and evolutionary history. Some scientists, however, have preferred the term phylogenetic systematics or phylogenetic taxonomy to emphasize the reliance on a phylogeny for classification. It is the most common and accepted method for classifying organisms.

Question

Oligochaetes have

		well-developed heads
		chaetae for locomotion
		lungs for respiration
		a muscular foot
		a radula

Which one of the following animals has an open circulatory system?

		squid
		earthworm
		mussel
		octopus
		polychaete

please help with these two questions

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