Some salient features and phyla of organisms are given below. Select the option which shows the correct combination of organism, its phylum and salient features.
1. Hydra | Coelenterata | Bilateral symmetry | Cnidoblasts present |
2. Planaria | Platyhelminthes | Bilateral symmetry | High regeneration capacity |
3. Ancylostoma | Annelida | Bilateral symmetry | Elongated and worm shape |
4. Octopus | Mollusca | Radial symmetry | External skeleton of shell present |
Select the option that correctly matches characteristic features with the group of three animals.
(1) Skeleton of spicules − Sycon, Adamsia, Spongilla
(2) Excretion by flame − Taenia, Fasciola, Ancylostoma
(3) Mouth contains radula − Dentalium, Octopus, Ophiura
(4) Jointed appendages − Limulus, Apis, Laccifer
Water transport system or canal system is a characteristic feature of which animal?
1. Spongilla
2. Hydra
3. Asterias
4. Echinus
Fresh water sponge is the common name of
(1) Hydra
(2) Sycon
(3) Spongilla
(4) Euspongia
Collar cells are present in the members of which phyla
1. Echinodermata
2. Coelenterata
3. Ctenophora
4. Porifera
Fragmentation is a method of asexual repoduction in
(1) Annelida
(2) Platyhelminthes
(3) Aschelminthes
(4) Porifera
The digestive system in Meandrina is
(1) Digestion is extracellular only
(2) Digestion is intracellular only
(3) Digestion is both extracellular and intracellular
(4) Digestion absent as it is a parasite
Both polyp and medusa life forms are present in the life cycle of
(1) Obelia
(2) Physalia
(3) Aurelia
(4) Adamsia
The skeleton of corals is made up of
(1) Calcium silicate
(2) Calcium phosphate
(3) Hydroxyapatite
(4) Calcium carbonate
Which of the following group consists exclusively of cnidarians?
(1) Aplysia, Gorgonia, Spongilla, Hydra
(2) Hydra, pennatula, obelia, Echinus
(3) Hydra, obelia, adamsia, physalia
(4) Scypha, Hydra, adamsia, physalia