Question

write differences between chordata and non-chordata. ​

Answer 1

Explanation:

For Non - Chordates

1. Non - chordates are less evolved animals and are on the levels of evolution.
2. Non - chordates do not have notochord.
3. Nerve cord is located on the ventral side of the body.
4. Heart if present is on the dorsal side of the body.

For Chordates

1. Chordates are more evolved animals and are on the higher levels of evolution.
2. Chordates have notochord at least in some stage of development.
3. Nerve cord is located on the dorsal side of the body.
4. Heart if present is on the ventral side of the body.

Answer 2

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.