Disadvantages of flatworm digestive system

What could be deduced from these data about the structure
May 1, 2020
Solution-Diagram both crosses and explain the results
May 1, 2020

Disadvantages of flatworm digestive system

1. flatworms are the first organism we have discussed with an anterior posterior orientation how does this affect their movements compared to the movement of more primitive organisms

2. What are the disadvantages of a flatworm’s digestive system having only one opening

3. the complete digestive tract of nematodes and other phyla allows functional specialization. what specializations are common in the digestive tract of higher ornasims such as humans

4. what is the advantage of radial symmetry for sessile animals such as hydras and bilateral symmetry for mobile animals such as planaria? what major evolutionary trends accompany bilateral symmetry?