difference between chordata and non- chordata ?
Answers
Answer:
Pharyngeal gill slits are present at some stage of life in Chordates and it is completely absent in Non-chordates. Chordates can be cold or warm-blooded, while Non-chordates are cold-blooded only. Nerve cord is single, dorsal, without ganglia in Chordates and in Non-chordates it is double, ventral.
Answer:
Difference # Chordates:
1. A notochord is present at some stage in the life of a chordate.
2. Central nervous system is dorsal and hollow.
3. Gill slits are present in the pharynx either in the embryo or adult.
4. Tail is present at some stage in the life of the chordate.
5. Heart is ventral.
6. If present RBCs contain respiratory pigment (haemoglobin).
Difference # Non-chordates:
1. Notochord is not present at any stage in the life of a non-chordate.
2. Central nervous system is ventral and solid.
3. Gill slits are absent.
4. Tail is absent.
5. Heart is dorsal (if present).
6. If haemoglobin or other respiratory pigment is present, it is found in the blood plasma. RBCs are absent.