The aortic arches function as hearts, pumping blood through a closed circulatory system. Therefore, which of the following are true statements about how blood travels in an earthworm? 

What form is this specimen?

Which of the following structures is/are associated with the cephalothorax?  

What is the primary factor that limits the population growth of P. caudatum and P. aurelia in a closed culture?

Match each fungal group to their method of asexual reproduction. 

What is the function of the anterior and posterior adductor muscles?  

What is this structure found on the lateral (starting from the “head” to the “tail”) side of the fish? This structure aids in locomotion.

Match each fungal group with their method of asexual reproduction. 

The gizzard is an enlarged chamber of the stomach in which _____________. 

What is the function of the operculum?