B)
Both occur in only one direction.
True, Chordates are animals in Phylum Chordata.Chordates include all of the vertebrates, in which the notochord develops into a backbone, as well as some invertebrates. Invertebrate chordates include tunicates and lancelets.
Answer:
I believe it's Energy and organic matter can't be recycled and must constantly be supplied to an ecosystem not entirely sure though
Explanation:
