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Echinoderms, hemichordates and chordates...

Echinoderms, hemichordates and chordates have a

A

different ancestral stock

B

common ancestral stock

C

similar nervour system

D

common external characters.

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The correct Answer is:
B
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[A] : The Ascidian tadpole larva possess all the basic chordate characters. [R] : Both urochordates and other chordates have originated from a common ancestor .

Define chordates.

TRUEMAN BIOLOGY-ANIMAL KINGDOM -NONCHORDATES -MCQ
  1. Tornaria, the larva of Balanoglossus which resembles with bipinnaria l...

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  2. Hemichordates resembles annelids in

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  3. Echinoderms, hemichordates and chordates have a

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  4. Blood vascular system in hemichordata is 1. open 2. reduced 3. clos...

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  5. Balanoglossus possesses 1. Dorsal nerve cord 2. Ventral nerve cord ...

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  6. Respiration occurs in Balanoglossus by 1. gill slits 2. general body...

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  7. Asexual reproduction occurs in Hemichordata by

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  8. Proboscis gland in Balanoglossus is accociated with

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  9. Connecting link between chordates and non-chordates is

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  10. Which of the following animals belongs to phylum Coelenterata?

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  11. Which of the following is not correctly matched?

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  12. Which of the following statements are incorrec? (i) Parapodia are l...

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  13. Which of the following are invertebrates 1. Insects 2. Birds 3....

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  14. Which of the following are most intelligent invertebrates. 1. Crustac...

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  15. "Royal jelly" is secreted by worker Honey-bees. Name the gland which s...

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  16. Munga silk worm feeds on

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  17. Which one of the following is a correct match

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  18. Which one of the following genus of insects prefer to breed in clean w...

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  19. Which one of the following animal possesses gaint chromosome?

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  20. In Prawn, excretion is carried out by

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