1
IAT (IISER) 2025
MCQ (Single Correct Answer)
+4
-1

$$ \text { Match the entries in column I and column II. } $$

Column I Column II
P. Notochord and hollow nerve cord present i. Cyclostomata
Q. Ectoparasite with 6-15 pairs of gills and closed circulation ii. Chondrichthyes
R. Marine animals with persistent notochord and placoid scales iii. Hemichordata
S. Animals with open circulatory systems, and stomochord iv. Chordata
Which one of the following combinations is correct?
A

$$ \text { P - iv; } \quad \text { Q - i; } \quad \mathrm{R}-\mathrm{ii} ; \quad \mathrm{S}-\mathrm{iii} $$

B

P - iv; Q - ii; R - i; S - iii

C

$$ \mathrm{P}-\mathrm{i} ; \quad \mathrm{Q}-\mathrm{iii} ; \quad \mathrm{R}-\mathrm{ii} ; \quad \mathrm{S}-\mathrm{iv} $$

D

$$ \mathrm{P}-\mathrm{iii} ; \quad \mathrm{Q}-\mathrm{i} ; \quad \mathrm{R}-\mathrm{ii} ; \quad \mathrm{S}-\mathrm{iv} $$

2
IAT (IISER) 2024
MCQ (Single Correct Answer)
+4
-1
Which one of the following statements is correct?
A
Hemichordata is not a chordate sub-phylum because it has a water vascular system.
B
Hemichordata is a chordate sub-phylum with a proto-notochord called stomochord.
C
Hemichordata is a chordate sub-phylum with a proper notochord and gill slits.
D
Hemichordata is not a chordate sub-phylum, with a proto-notochord called stomochord.
3
IAT (IISER) 2022
MCQ (Single Correct Answer)
+4
-1
Organisms in which of the following phyla are triploblastic, acoelomate and have bilateral symmetry?
A
Arthropoda
B
Mollusca
C
Platyhelminthes
D
Hemichordata
4
IAT (IISER) 2020
MCQ (Single Correct Answer)
+4
-1
Radial symmetry is NOT found in which of the following taxa?
A
Echinodermata
B
Cnidaria
C
Ctenophora
D
Cyclostomata

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