Flatworms are a diverse group living in freshwater and marine habitats. Protonephridia are found in some species of flatworms. This organ is a series of tubes and pumps to get rid of excess water that enters the worm passively from the environment. Which group of flatworms (freshwater or marine) does your group think have the protonephridia system

Freshwater

Explanation:

Protonephridia are made up of many flame cells. Flame cells are specialized excretory cell found in the simplest freshwater invertebrates like flatworms.

children tend to take more after their grandparents more than their parents. it’s the dna you received that was passed down to you somewhere in your family. maybe one of your grandparents had/has straight hair and you might have gotten it from them.