Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). [2022]
Assertion (A): All vertebrates are chordates but all chordates are not vertebrates.
Reason (R): Notochord is replaced by vertebral column in the adult vertebrates.
In the light of the above statements, choose the appropriate answer from the options given below:
Both (A) and (R) are correct and (R) is the correct explanation of (A)
(A) is correct but (R) is not correct
(A) is not correct but (R) is correct
Both (A) and (R) are correct but (R) is incorrect explanation of (A)
(1)
Phylum Chordata possesses three sub-phyla (Urochordata, Cephalochordata, Vertebrata) which possess notochord at some stage of their life. The members of subphylum Vertebrata possess notochord during the embryonic period. The notochord is replaced by a cartilaginous or bony vertebral column in the adult. Thus, all vertebrates are chordates but all chordates are not vertebrates.
Match the following. [2021]
| List - I
|
List - II |
| (p) Physalia | (i) Pearl oyster |
| (q) Limulus | (ii) Portuguese man of war |
| (r) Ancylostoma | (iii) Living fossil |
| (s) Pinctada | (iv) Hookworm |
Choose the correct answer from the options given below:
p-(i), q-(iv), r-(iii), s-(ii)
p-(ii), q-(iii), r-(i), s-(iv)
p-(iv), q-(i), r-(iii), s-(ii)
p-(ii), q-(iii), r-(iv), s-(i)
(4)
Physalia - Portuguese man of war
Limulus - Living fossil
Ancylostoma - Hookworm
Pinctada - Pearl oyster
Which one of the following organisms bears hollow and pneumatic long bones? [2021]
Ornithorhynchus
Neophron
Hemidactylus
Macropus
(2)
Endoskeleton of Neophron (vulture) that belongs to Class Aves is fully ossified (bony) and bears hollow and pneumatic long bones.
Read the following statements. [2021]
(A) Metagenesis is observed in helminths.
(B) Echinoderms are triploblastic and coelomate animals.
(C) Roundworms have organ-system level of body organization.
(D) Comb plates present in ctenophores help in digestion.
(E) Water vascular system is characteristic of echinoderms.
Choose the correct answer from the options given below:
(B), (C), and (E) are correct
(C), (D), and (E) are correct
(A), (B), and (C) are correct
(A), (D), and (E) are correct
(1)
Metagenesis is observed in Obelia, which belongs to the Phylum Coelenterata. Comb plates present in ctenophores help in locomotion.
Match List - I with List - II. [2021]
| List - I | List - II |
| (p) Metamerism | (i) Coelenterata |
| (q) Canal system | (ii) Ctenophora |
| (r) Comb plates | (iii) Annelida |
| (s) Cnidoblasts | (iv) Porifera |
Choose the correct answer from the options given below:
p-(iv), q-(i), r-(ii), s-(iii)
p-(iv), q-(iii), r-(i), s-(ii)
p-(iii), q-(iv), r-(i), s-(ii)
p-(iii), q-(iv), r-(ii), s-(i)
Bilaterally symmetrical and acoelomate animals are exemplified by [2020]
Ctenophora
Platyhelminthes
Aschelminthes
Annelida
(2)
Platyhelminthes are bilaterally symmetrical, triploblastic, and acoelomate animals with an organ level of organization.
Match the following columns and select the correct option. [2020]
| Column-I | Column-II |
| (A) 6-15 pairs of gill slits | (i) Trygon |
| (B) Heterocercal caudal fin | (ii) Cyclostomes |
| (C) Air bladder | (iii) Chondrichthyes |
| (D) Poison sting | (iv) Osteichthyes |
Choose the correct answer:
A-(ii), B-(iii), C-(iv), D-(i)
A-(iii), B-(iv), C-(i), D-(ii)
A-(iv), B-(ii), C-(iii), D-(i)
A-(i), B-(iv), C-(iii), D-(ii)
Which of the following statements are true for the Phylum Chordata? [2020]
(A) In Urochordata, notochord extends from head to tail, and it is present throughout 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.
(D) and (C)
(C) and (A)
(A) and (B)
(B) and (C)
(4)
In Urochordata, notochord is present only in the larval tail. Phylum Chordata is divided into three subphyla: Urochordata or Tunicata, Cephalochordata, and Vertebrata.
Match the following columns and select the correct option. [2020]
| Column-I | Column-II |
| (A) Gregarious, polyphagous pest | (i) Asterias |
| (B) Adult with radial symmetry and larva with bilateral symmetry | (ii) Scorpion |
| (C) Book lungs | (iii) Ctenoplana |
| (D) Bioluminescence | (iv) Locusta |
A-(i), B-(iii), C-(ii), D-(iv)
A-(iv), B-(i), C-(ii), D-(iii)
A-(iii), B-(ii), C-(i), D-(iv)
A-(ii), B-(i), C-(iii), D-(iv)
Match the following organisms with respective characteristics. [2019]
| Organisms | Characteristics |
| (A) Pila | (i) Flame cells |
| (B) Bombyx | (ii) Comb plates |
| (C) Pleurobrachia | (iii) Radula |
| (D) Taenia | (iv) Malpighian tubules |
Select the correct option from the following:
A-(iii), B-(ii), C-(iv), D-(i)
A-(iii), B-(ii), C-(i), D-(iv)
A-(iii), B-(iv), C-(ii), D-(i)
A-(ii), B-(iv), C-(iii), D-(i)
(3)
The buccal cavity of Pila (apple snail) possesses a rasping organ, radula, with a transverse row of teeth for cutting grass. Bombyx (silk moth), an insect, has Malpighian tubules as excretory organs. Pleurobrachia is a ctenophore having eight ciliary plates called comb plates. Taenia is a platyhelminth having flame cells for excretion and osmoregulation.
