Question

3) Distinguish between: Non-chordates Chordates i) Donot have noto-chord. i) ii) There are pharyngeal gill slits. i) iii) Nerve cord is located ii) on the ventral side of the body. iv) Heart if present is on ventral side of thee body.​

Answer 1

4x2+10x+25

4x2+10x+25

4x2+10x+25

Answer 2

Answer:

Chordates-

1) Animal having a notocord or backbone in their body structure are called chordates. 1) Animals without a notochord are called non-chordates.

2) Central nervous system is hollow and dorsal. 2) It is solid and ventral.

3) Heart is ventrally placed. 3) If present, it is on the dorsal side.

4) Haemoglobin is present in the RBCs. 4) If present, it is dissolved in the plasma.

5) Post anal tail is present. 5) It is absent in them.

6) Pharyngeal gill slits is present at some stage of life.

Non Chordates -

1)Animals without a notochord are called non-chordates.

2) It is solid and ventral.

3) If present, it is on the dorsal side.

. 4) If present, it is dissolved in the plasma.

5) It is absent in them.

6) It is absent in them.

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