Q. No.Which of the following is not a feature of Tunicates?
| 1. | Only the larvae have notochord |
| 2. | Presence of endostyle |
| 3. | Secretion of cellulose sac |
| 4. | Larvae are voracious eaters |
Identify the option where all the columns are not correctly matched:
| Animal | Phylum | Features | |
| 1. | Pleurobrachia | Ctenophora | Comb plates, Only sexual reproduction |
| 2. | Loligo | Mollusca | Radula, Dioecious |
| 3. | Balanoglossus | Hemichordata | Respiration by gills, excretion by Proboscis gland |
| 4. | Ascidia | Chordata | Marine, Notochord persistent throughout life |
Identify the incorrectly matched pair:
| Animals | Feature present in both | |
| 1. | Balanoglossus and Pinctada | Open circulatory system |
| 2. | Branchiostoma and Ascidia | Persistent notochord |
| 3. | Aplysia and Pheretima | True coelom |
| 4. | Gorgonia and Pennatula | Cnidoblasts |
An important characteristic that hemichordates share with chordates is
1. absence of notochord
2. ventral tubular nerve cord
3. pharynx with gill slits
4. pharynx without gill slits
Which one of the following is correctly matched with its one characteristic and the taxon?
| Animals | Characteristic | Taxon | |
| 1. | Millipede | Ventral nerve cord | Arachnida |
| 2. | Duckbill platypus | Oviparous | Mammalia |
| 3. | Silverfish | Pectoral and pelvic fins | Chordata |
| 4. | Sea anemone | Triploblastic | Cnidaria |
Select the animal that exhibits retrogressive metamorphosis.
(1) Bufo
(2) Amphioxus
(3) Limulus
(4) Herdmania
Which of the following is not an excretory structure found in invertebrates?
1. Flame cells
2. Malpighian tubules
3. Nephridia
4. Kidney
Which of the following is not a feature of the phylum chordata?
1. Dorsal heart
2. Central nervous system is dorsal
3. Paired pharyngeal gill slits
4. Post anal tail
The presence of notochord in the larval tail is a characteristic of
1. Doliolum
2. Branchiostoma
3. Balanoglossus
4. Petromyzon
The structure present in all adult vertebrates is:
| 1. | Notochord |
| 2. | Dorsal tubular nerve cord |
| 3. | Pharyngeal gill slits |
| 4. | All of the above |
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