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Q301.
List-I (Phylum)
List-II (Excretory Structure)
(a) Platyhelminthes
i) Malpighian tubules
(b) Annelida
ii) Proboscis gland
(c) Arthropoda
iii) Flame cells
(d) Hemichordata
iv) Nephridia
[Animal-Kingdom] [class-xi]
Correct option: A [ A ]
Remark: Platyhelminthes have flame cells for osmoregulation and excretion. Annelida use nephridia. Arthropoda show excretion via Malpighian tubules. Hemichordata possess a proboscis gland.
Q302.
List-I (Animal)
List-II (Phylum)
(a) Pila
i) Echinodermata
(b) Asterias
ii) Annelida
(c) Nereis
iii) Mollusca
(d) Ascaris
iv) Aschelminthes
[Animal-Kingdom] [class-xi]
Correct option: B [ B ]
Remark: Pila (apple snail) is a Mollusc (Mollusca). Asterias (star fish) is an Echinoderm (Echinodermata). Nereis is an Annelid (Annelida). Ascaris (roundworm) is an Aschelminth (Aschelminthes).
Q303.
List-I (Term)
List-II (Description)
(a) Coelomate
i) Body cavity is absent
(b) Acoelomate
ii) Body cavity is not lined by mesoderm
(c) Pseudocoelomate
iii) Body cavity is lined by mesoderm
(d) Diploblastic
iv) Cells arranged in two embryonic layers
[Animal-Kingdom] [class-xi]
Correct option: A [ A ]
Remark: Coelomate animals possess a coelom: a body cavity lined by mesoderm. Acoelomate animals have no body cavity. Pseudocoelomate animals have a body cavity that is not lined by mesoderm. Diploblastic animals have two embryonic layers (ectoderm and endoderm).
Q304.
List-I (Class)
List-II (Heart Chambers)
(a) Pisces (Fishes)
i) 3-chambered
(b) Amphibia
ii) 4-chambered
(c) Reptilia (most)
iii) 2-chambered
(d) Aves (Birds)
iv) Usually 3-chambered
[Animal-Kingdom] [class-xi]
Correct option: C [ C ]
Remark: Pisces (fishes) possess a 2-chambered heart (one auricle, one ventricle). Amphibia typically have a 3-chambered heart (two atria, one ventricle). Most Reptilia have a 3-chambered heart (except crocodilians which have 4). Aves have a 4-chambered heart.
Q305.
List-I (Structure)
List-II (Phylum)
(a) Parapodia
i) Mollusca
(b) Radula
ii) Ctenophora
(c) Comb plates
iii) Annelida
(d) Water vascular system
iv) Echinodermata
[Animal-Kingdom] [class-xi]
Correct option: B [ B ]
Remark: Parapodia are lateral appendages characteristic of certain annelids (e.g., Nereis). Radula is the rasping feeding organ of Mollusca. Comb plates are rows of ciliated plates in Ctenophora used for locomotion. Water vascular system is the distinctive feature of Echinodermata.
Q306.
List-I (Animal)
List-II (Class)
(a) Petromyzon
i) Chondrichthyes
(b) Scoliodon
ii) Osteichthyes
(c) Hippocampus
iii) Reptilia
(d) Chameleon
iv) Cyclostomata
[Animal-Kingdom] [class-xi]
Correct option: A [ A ]
Remark: Petromyzon (lamprey) belongs to Cyclostomata. Scoliodon (dogfish) is a Chondrichthyan. Hippocampus (seahorse) is an Osteichthyan. Chameleon is a Reptile (Reptilia).
Q307.
List-I (Feature)
List-II (Group)
(a) Dry and cornified skin
i) Aves
(b) Moist skin without scales
ii) Mammalia
(c) Presence of feathers
iii) Reptilia
(d) Presence of hair
iv) Amphibia
[Animal-Kingdom] [class-xi]
Correct option: D [ D ]
Remark: Reptilia: body covered by dry and cornified skin with epidermal scales or scutes. Amphibia: skin moist and without scales. Aves: presence of feathers is the defining feature. Mammalia: presence of hair on skin.
Remark: Protochordate: Salpa is an example of Urochordata (protochordate). Jawless vertebrate: Myxine (hagfish) is a jawless vertebrate (Cyclostomata). Cartilaginous fish: Trygon (stingray) is in Chondrichthyes. Limbless amphibia: Ichthyophis is a limbless amphibian.
Q310.
List-I (Phenomenon)
List-II (Phylum)
(a) Metagenesis
i) Annelida
(b) Bioluminescence
ii) Arthropoda
(c) Metamerism
iii) Cnidaria
(d) Jointed appendages
iv) Ctenophora
[Animal-Kingdom] [class-xi]
Correct option: B [ B ]
Remark: Metagenesis (alternation of generations) is exhibited by some Cnidarians like Obelia. Bioluminescence (emitting light) is well-marked in Ctenophora. Metamerism (segmentation) is a characteristic of Annelida. Jointed appendages are a key feature of Arthropoda.