Hemichordata

Q.

Protochordata mark the evolution of a new type of body structure. How?

1. By presence of notochord

2. By separating nervous tissue from the gut

3. By developing a circulatory system

4. None of the above.

Q.

Protochordata marks the evolution of a new type in the body structure. How?

1. By presence of notochord

2. By separating nervous tissue from the gut

3. By developing a circulatory system

4. None of the above.

Q.

Protochordata marks the evolution of a new type in the body structure. How?

1. By presence of notochord

2. By developing a circulatory system

3. By separating nervous tissue from the gut

4. None of the above.

Q. Choose the correct answers from the alternatives given.
Of the following groups of organisms, which is the most evolutionarily advanced, with more complex body structure?

1. Roundworms
2. Cnidaria
3. Sponges
4. Flatworms