Identify the option where all the columns are not correctly matched:

Identify the incorrectly matched pair:

The character that gives the Phylum Chordata is shown by:

1. A

2. B

3. C

4. D

Consider the following statements:

Chordates-

I. Possess a solid, single and ventral nerve cord

II. Have pharyngeal gill slits at some point during their development.

III. Have post-anal tail

Which of the above statements are true?

1 I and II only

2. I and III only

3. II and III only

4. I, II and III

Which of the following is not an excretory structure found in invertebrates?

1. Flame cells

2. Malpighian tubules

3. Nephridia

4. Kidney

The presence of notochord in the larval tail is a characteristic of

(1) Doliolum

(2) Branchiostoma

(3) Balanoglossus

(4) Petromyzon

Identify the chordates in which the notochord persists in the adult?

(1) Tunicates

(2) Lancelets

(3) Cyclostomata

(4) Bony fishes

Which of the following would be a characteristic of the animal shown in the given diagram?

1. Excretory organ is the proboscis gland.

2. They migrate for spawning to fresh water.

3. Notochord is present only in the larval tail.

4. Parapodia are present for swimming.

False statement with respect to Ascidia is

1. Present exclusively in marine water

2. It is a urochordate and notochord is present only in larval tail

3. It is a vertebrate because it has a notochord

4. It is a protochordate

All vertebrates are chordates but all chordates are not vertebrates, why?