Subphylum Cephalochordata

Q. Notochord is persistent throughout the life in____________

1. Protochordates
2. Urochordates
3. Cephalochordates
4. All chordates

Q. The common feature shared by Amphioxus, Salpa and Doliolum is ______.

1. presence of a vertebral column
2. presence of a notochord throughout their life
3. similar habitat
4. presence of a solid nerve cord

Q. Branchiostoma belongs to:

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

Q. Which of the following adult protochordate has a notochord?

1. Amphioxus
2. Petromyzon
3. Ascidia
4. Salpa

Q. Which of the following statements are true for the phylum - chordata?
(a) In urochordata notochord extends from head to tail and it is present throughtout their life.
(b) In Vertebrata notochord is present during the embryonic period only.
(c) Central nervous system is dorsal and hollow.
(d) Chordata is divided into 3 subphyla: Hemichordata, Tunicata and Cephalochordata.

1. (a) and (b)
2. (b) and (c)
3. (d) and (c)
4. (c) and (a)

Q. Branchiostoma belongs to:

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

Q. Pisces is divided into how many classes

Q.

Directions: Choose the correct option:

Assertion $\left(A\right):$ Sharks belong to cartilaginous fishes.

Reason $\left(R\right):$ Gill slits are not covered by operculum.

Q.

What are protochordates with example?

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. Notochord is persistent throughout the life in____________

1. Protochordates
2. Urochordates
3. Cephalochordates
4. All chordates

Q. Notochord is persistent throughout the life in____________

1. Protochordates
2. Urochordates
3. Cephalochordates
4. All chordates

Q. In Urochordata, notochord is found in

1. head of the adult
2. tail of adult
3. tail of larva
4. head of larva

Q. Which of the following adult protochordate has a notochord?

1. Amphioxus
2. Petromyzon
3. Ascidia
4. Salpa

Q. The common feature shared by Amphioxus, Salpa and Doliolum is ______.

1. presence of a vertebral column
2. presence of a notochord throughout their life
3. similar habitat
4. presence of a solid nerve cord

Q.

Why does Jellyfish sting?

Q. Retrogressive metamorphorsis occurs in:

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

Q. In Urochordata, notochord is found in

1. head of the adult
2. tail of adult
3. tail of larva
4. head of larva

Q. Which of the following organisms neither have notochord nor vertebral column in their adult stage?

1. Herdmania
2. Cephalochordate
3. Petromyzon
4. Bdellostoma

Q. To which group the organism, showing the above-shown life cycle, belongs to?

1. Hydrozoan (Cnidaria)
2. Metazoa
3. Protozoa
4. Submetazoa

Q. Which of the following is true about sub-phylum Cephalochordata?

1. Notochord is replaced by a vertebral column in the adult
2. Notochord extends from head to tail
3. They are also called tunicates
4. Notochord is present only in larval tail

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