Opening of a flatworm used for collection of food and expulsion of waste

Flatworms only has one opening that they use for digesting and excretion of wastes. They do not have a true body. The opening is  contains a part that is used to vacuum in food called flukes which can have a pharynx. Flatworms are flattened invertebrates. That lives as a parasite.

Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.

The answer would be true