Which of the following reproduction is/are more common in coelenterates?
a) asexual
b) sexual
c) parthenogenesis
d) both b and c
Explanation: asexual reproduction either by budding or fragmentation
Which of the following is the unique character of coelenterates?
a) digestion
b) nematocyt
c) polymorphism
d) asexual reproduction
Explanation: the existence of a single species in more than two morphological forms (individual types) is termed as polymorphism.
Which of the following is/are the major type/s of zooids in coelenterates?
a) polyps
b) medusae
c) gastrozoids
d) both a and b
Explanation: polyps tube like body and medusae umbrella like body
Which of the following is the unique character of coelenterates?
a) digestion
b) nematocyt
c) alternation of generation
d) asexual reproduction
Explanation: asexual generation alternates sexual generation
In obelia (coelenterate) the sperms fertilize the eggs and the larva is formed which is called……..
a) planula
b) trochophore
c) bipinnaria
d) glochidium
Explanation: planula larva grows into a new polyp and polyp produce medusa and medusa produces a polyp (alternation of generation or metagenesis)
Which of the following is/are the common example/s of coelenterates or cnidarians?
a) hydra and obelia
b) jelly fish and corals
c) sea anemone
d) all of these
