Yesterday I went on a trip to the beach. I saw several different organisms. First I saw a sea sponge. It had a body that was not
symmetrical at all, which is (1)______________. It also belongs to group of animals called (2)_______________as they have no backbone. The sponge feeds by (3)______________ food out of the water. This means it separates the food from the water. Then I saw a sea star that has a body with many lines of symmetry that pass through a central point called (4)___________________. I also saw a crab that has a body that is divisible into two mirror parts by a central line called (5)__________________. It also has an external skeleton or a (6)________________. I caught a shark which controls its body temperature by external means making it a (7)______________. The shark is a (8)___________________ or has a backbone. It also has an internal skeleton called a (9)__________________. It was a very chilly day so I am glad I am a (10)___________________ which means I control my temperature by internal means.
