1. | Metamerism appeared for the first time in annelida |
2. | Arthropods have jointed appendages and chitinous exoskeleton |
3. | Reptiles are endotherms |
4. | Forelimbs of birds are modifies into wings |
1. | Scoliodon | 2. | Hippocampus |
3. | Chelone | 4. | Pteropus |
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1. | Echinodermata | Water vascular system |
2. | Hemichordata | Stomochord |
3. | Cyclostomata | Cartilaginous jaw |
4. | Cephalochordata | Notochord persistent throughout life |
Column I | Column II | ||
A. | Porifera | P | Metagenesis |
B. | Cnidaria | Q | Flame cells |
C. | Ctenophora | R | Comb Plates |
D. | Platyhelminthes | S | Choanocyte |
A | B | C | D | |
1. | R | Q | S | P |
2. | S | P | R | Q |
3. | P | S | Q | R |
4. | Q | R | P | S |
1. | Obelia | Metagenesis |
2. | Planaria | Free living with high regeneration capacity |
3. | Ancylostoma | Acoelomate |
4. | Nereis | Parapodia |
COLUMN I | COLUMN II | ||
A. | Petromyzon | P | A jawless vertebrate |
B. | Icthyophis | Q | A limbless amphibian |
C. | Struthio | R | A flightless bird |
A | B | C | |
1. | Q | R | P |
2. | Q | P | R |
3. | P | Q | R |
4. | P | R | Q |
Which of the following represents the correct combination without any exception?
Characteristic | Class | |
1. | Mammary gland; hair on body; pinnae; two pairs of limbs | Mammalia |
2. | Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord | Chondrichthyes |
3. | Sucking and circular mouth; jaws absent; integument without scales; paired appendages | Cyclostomata |
4. | Body covered with feathers; skin moist and glandular; lungs with air sacs; fore limbs from wings | Aves |
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A jawless fish, which lays eggs in freshwater and whose ammocoetes larvae after metamorphosis return to the ocean is
1. | Eptratretus | 2. | Myxine |
3. | Neomyxine | 4. | Petromyzon |
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Which one of the following statements is totally wrong about the occurrence of notochord, while the other three are correct ?
1. It is present throughout life in Amphioxus
2. It is present only in larval tail in Ascidians
3. It is replaced by vertebral column in adult frog
4. It is absent throughout life in humans from the very beginning
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Choose the correct statement.
1. All mammals are viviparous
2. All cyclostomes do not possess jaws and paired fins
3. All reptiles have a three-chambered heart
4. All pisces have gills covered by an operculum
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