Thought Questions 15. Explain the presence of specialized digestive organs in th

Question

Thought Questions 15. Explain the presence of specialized digestive organs in the animals studied in this laboratory given that they all have a coelom and a complete digestive system with a separate mouth and anus. Explain why an earthworm will die if it dries out based on the type of skeleton annelids have and the absence of a respiratory organ or system in the earthworm. 16. 17. Contrast an arthropod, the crayfish or the grasshopper, with the representative echinoderm, the starfish, with regard to signs of cephalization and how the type of symmetry each has is related

Explanation / Answer

15. The names of the animals are not mentioned but specialised digestive structures are present for absorbtion of food, sometimes digestion too even after having a mouth and an a*** and a complete digestive system.

16. earthworms breath and exchange gases through their skin they die due to oxygen starvation.

17.

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