Question

Question 2 How do annelid animals differ from arthropods?

Class 9 - Science - Diversity in Living Organisms Page 94

Answer 1

                Annelids                                               Arthropods

   1. Annelids consist closed                      1. Arthropods contain open
         circulatory system.                                 circulatory system.

   2. They are also called as                       2. They are generally called as
       segmented worms.                                  "animals with jointed legs"

   3. Breathing occurs through skin.           3. Breathing occurs through                                                                                            lungs, trachea, gills etc.

   4. Earthworm, leeches are the best        4. Crab, cockroaches are the                        examples.                                                  best examples
                
   5. Distinct head isn't present.                  5. Differentiate be head,                                                                                                    thorax and abdomen.

Answer 2

There are some features of Phylum (VIII) Arthropoda different from Annelids or we can say that Annelids do not have these features/advancements

1-Distinct head in all species,
2-Jointed Appendages serving a variety of functions.
3-Jointed exoskeleton for protection and muscle attachment.
4-Stiped muscles arranged in bundles for moving particular parts.
5-Special respiratory organs, such as gills, trachae,book-lungs, in majority of cases.
6-Well developed sense organs,such as compound eyes, statocysts, auditory organs, taste receptors, etc.
7-Endocrine glands and pheromone secretion for communication.