Exercise 1. Comparative Anatomy Type of Circulatory outstanding Features Hydra Grasshopper Fish mad dues they es hd. Crocodile ot 4 chamber order Testud Bird cestors uidh vocodile sin sabdas each Contract of heart muscle Human eard asse (s 49 Advantages/ Disadvantages an is Solution -Advantage: Can live up to 100 years and can wait for a year between their meals. Disadvantage: Harmful to humans and another animal as it is a successful predator. advantage: competes with fish for food in a pond Disadvantage: Can\'t be kept as a pet as the tortoises. Advantage: provides eggs and meat once the fertility decreases. Disadvantage: they can\'t control their bowel movements and thus leave lots of droppings.crocodilethe crocodiles are the most advanced reptile and have the lifespan of about 71 years on an average -Advantage: Can live up to 100 years and can wait for a year between their meals. Disadvantage: Harmful to humans and another animal as it is a successful predator.Turtlehave an outstanding feature of night vision which is due to the presence of a large number of rod cells. advantage: competes with fish for food in a pond Disadvantage: Can\'t be kept as a pet as the tortoises.birdA unique feature of birds are their beaks and the wings that are different in different species. Advantage: provides eggs and meat once the fertility decreases. Disadvantage: they can\'t control their bowel movements and thus leave lots of droppings.DogA unique characteristic of dogs is the learning ability which makes them attain outstanding leadership skills.They are best friendly pets and can be a good friend. the most disadvantage of having the dog as a pet is that you will need to maintain extra hygiene into your home.humanThe most social animal and have bones that is as much strong as granite.The biggest advantage humans have over other animals is the ability to think, speak and the intellect to act accordingly. Disadvantage: The developed brain which can do wonders as well as harm..