Which characteristic distinguishes Cnidarians from Ctenophores, despite both phyla exhibiting radial symmetry and a gelatinous body form?
Presence of a complete digestive system
Presence of cnidocytes (stinging cells)
Bioluminescence capability
Use of colloblasts for prey capture
Related Questions
Polyp phase is absent in
Hydra
Aurelia
Physalia
Obelia
Radial symmetry is seen in
Hydra
Schistosoma
Taenia
Fasciola
Which of the following features is NOT characteristic of the phylum Cnidaria?
Tissue level of organization
Presence of cnidoblasts
Diploblastic body plan
Triploblastic body plan
The nerve net of Hydra lacks
Neurons
Connections
Dendrites
Directions in impulse
What type of symmetry is exhibited by cnidarians?
Bilateral symmetry
Radial symmetry
Asymmetry
Spherical symmetry
The poisonous fluid present in nematocyst of Hydra is
Hypnotoxin
Neurotoxin
Hemotoxin
Cytotoxin
The body cavity of a cnidarian is called the:
Coelom
Gastrovascular cavity
Pseudocoelom
Haemocoel
Which of the following describes metagenesis?
Transformation of a larva into an adult form.
Alternation of generations between a sexual and an asexual phase.
Reproduction solely through asexual means.
Reproduction solely through sexual means.
Which of the following is wrongly matched?
Arthropoda – Cockroach
Annelida – Hydra
Echinodermata – Star fish
Nemathelminthes – Ascaris
Regeneration in Hydra will be faster, if it is cut off from
hypostome
tentacles
basal disc
mouth
