What are the disadvantages of a flatworms digestive system having

The provided question is incomplete, however the complete question is as follows:

What are the disadvantages of a flatworm's digestive system having only one opening?

The correct answer is - cannot consume food continuously .

Explanation:

The main disadvantage of digestive system in the flatworm are one way of opening which is a characteristic feature of many Platyhelminthes phylum organism. This type of digestive system where food enters and exits with the same and only opening available.

In flatworms, once the organism take the food it has to wait for the food to be digested and excreted out by the same opening it use to eat and leave the same opening.

Thus, the correct answer is - cannot consume food continuously.

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