Planaria posses high capacity of
(1) metamorphosis
(2) regeneration
(3) alternation of generation
(4) bioluminescence
In case of poriferans, the spongocoel is lined with flagellated cells called
1. ostia
2. oscula
3. choanocytes
4. mesenchymal cells
Which of the following features is not present in the phylum – Arthropoda?
(1) Metameric segmentation
(2) Parapodia
(3) Jointed appendages
(4) Chitinous exoskeleton
A marine cartilaginous fish that can produce electric current is
(1) Pristis
(2) Torpedo
(3) Trygon
(4) Scoliodon
Which of the following characteristic features always holds true for the corresponding group of animals?
| 1. | Viviparous | Mammalia |
| 2. | Possess a mouth with an upper and a lower jaw | Chordata |
| 3. | 3-chambered heart with one incompletely divided ventricle | Reptilia |
| 4. | Cartilaginous – endoskeleton | Chondrichthyes |
Choose the correct statements.
| 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 |
Which among these is the correct combination of aquatic mammals?
(1) Seals, Dolphins, Sharks
(2) Dolphins, Seals, Trygon
(3) Whales, Dolphins, Seals
(4) Trygon, Whales, Seals
Which one of the following living organisms completely lacks a cell wall?
(1) Cyanobacteria
(2) Sea-fan (Gorgonia)
(3) Saccharomyces
(4) Blue-green algae
Which one of the following characteristics is not shared by birds and mammals?
(1) Breathing using lungs
(2) Viviparity
(3) Warm blooded nature
(4) Ossified endoskeleton
Select the taxon mentioned that represents both marine and freshwater species
(1) Echinoderms
(2) Ctenophora
(3) Cephalochordata
(4) Cnidaria
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