Subphylum Urochordata

Q.

What are the characteristics of Urochordata?

Q. In _______, notochord is present only in larval tail while in ________, it extends from head to tail region and is persistent throughout their life.

1. Cephalochordata and Urochordata
2. Urochordata and Cephalochordata
3. Vertebrata and Cephalochordata
4. Cephalochordata and Vertebrata

Q.

What is Schizocelom and enterocoelous

Q.

Why are urochordates called tunicates?

Q.

Why do humans have a closed circulatory system?

Q. Retrogressive metamorphosis occurs in

1. Hemichordata
2. Cephalochordata
3. Urochordata
4. Vertebrata

Q. Proboscis gland in Balanoglossus is associated with

1. excretion
2. reproduction
3. respiration
4. digestion

Q.

Are protochordates and hemichordates the same?

Q.

Give one example each of Urochordata and Cephalochordata.

Q.

What is a cnidoblast cell? Where it is found?

Q.

Which type of circulatory system does Urochordates exhibit , open or closed?

Q. Which among the following animals are exclusively marine?

1. Cyclostomes
2. Chondrichthyes
3. Protochordates
4. Osteichthyes

Q. The mesoderm is considered to give rise to a majority of structures in the body. Which of the following options contains only the mesodermal structures?

1. Heart, blood, bones, notochord
2. Heart, enamel of tooth, muscles, cornea of eye
3. Notochord, blood, liver, muscles
4. Liver, enamel of teeth, bones, blood

Q.

Is Psilotum homosporous or heterosporous?

Q.

Why are Aschelminthes called pseudocoelomate?

Q.

Proboscis gland is associated with ...

Q.

What is secondary neurulation?

Q.

Are humans classified under phylum Chordata?

Q. Give one example of hemichordata, urochordata and cephalochordata,

Q.

What is the classification of phylum Chordata?

Q.

The tunicates are

1. Cephalochordata

2. Vertebrata

3. None

4. Urochordata

Q. Tunicata is a

1. sub phylum
2. class
3. super class
4. phylum

Q.

Is ascidia a protochordates?

Q. Retrogressive metamorphosis occurs in ____________ .

1. Hemichordata
2. Cephalochordata
3. Urochordata
4. Vertebrata

Q. In which among the following animals, retrogressive metamorphosis is found?

1. Vertebrata
2. Invertebrates
3. Chordates
4. Urochordata

Q. Statement 1: Cephalochordata bears notochord throughout their life.

1. Both statements 1 and 2 are incorrect
2. Both statements 1 and 2 are correct
3. Statement 1 is correct but statement 2 is incorrect
4. Statement 1 is incorrect but statement 2 is correct

Q.

Does Enteropneusta have notochord?

Q. The cephalochordates

1. Are exclusively marine in habitat
2. Retain the three primary chordate characters throughout the life
3. All of the above
4. Are ciliary feeders

Q. Which of the following characteristics occurs in urochordate larva but is/are lost during retrogressive metamorphosis?

1. Loss of notochord
2. Loss of tail
3. Experience reduction of nervous system to a visceral ganglion
4. All of the above

Q.

The flexible rod-like structure present in organisms under phylum ‘Chordata’ is ________.