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1. Sponges
a. are nonsymmetrical and have oscula
b. lack organization into tissues and organs but have specialized cells
c. possess cells that are capable of recognizing other sponge cells and have a simple digestive system
d. both a and b
I'm so confused on this question, because I think it's all of them...?

7. Which of the following is NOT a characteristic of mollusks?
a. pseudocoelomate body plan
b. bilateral symmetry
c. complete digestive tract
d. heavy fold that forms the outer body layer

8. Both mollusks and annelids
a. have true coeloms
b. have closed circulatory systems
c. have well-developed respiratory systems
d. carry out asexual reproduction


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