Question

organisms in phylum chordata are in that phylum because they have a notochord and a dorsal neural tube. true false essentially, all organisms in phylum chordata have a backbone and spinal cord as well as other characteristics, such as gill slits and a post anal tail true false cartilaginous fish are the only organisms classified as chordates true false

Explanation:

First Question:

Organisms in phylum Chordata are defined by having a notochord, dorsal neural tube (which develops into the spinal cord), along with other features. So the statement is true.

Not all chordates have a backbone (e.g., lancelets and tunicates are invertebrate chordates). So the claim that all in Chordata have a backbone is false.

Chordates include many groups like mammals, birds, reptiles, amphibians, bony fish, invertebrate chordates (lancelets, tunicates), etc., not just cartilaginous fish. So the statement is false.

Answer:

True

Second Question: