In between the two layers, a jelly like noncellular and nonliving material is present in coelenterates called…….
a) mesogloea
b) spongoocoel
c) pleura
d) pinacoderm
Which of the following is/are the function/s of ectoderm cells in cnidarians?
a) protection to the inner body
b) give rise to nematocyst
c) specialized for digestion
d) both a and b
In some coelenterates, there are special feeding which are called……..which perform only the function of nutrition for the whole colony?
a) enteron
b) gastrozoids
c) polyps
d) medusae
Explanation: This arrangement is found in Obelia and the animals of order siphonphora
Coelenterates are……..in feeding habit.
a) herbivores
b) omnivores
c) carnivores
d) saprophytics
Explanation: their food varies according their size from zooplanktons, insect larvae to small fish
Which of the following coelenterates are sessile?
a) obleia
b) corals
c) Physalia pelagica
d) both a and b
Which of the following is/are also called “Portuguese Man of War” and can swim at a rate of 12.1 cm/sec?
a) obleia
b) hydra
c) Physalia pelagica
d) Jelly fish
