Given below are the matching, of animals and their respiratory organs.
Column -1 — Column – II
A) Horse shoe crab Book gills
B) Scorpion Book lungs
C) Prawn Trahea
D) Centipede Gills
Which of the above are correct ?
[A] only A and B
[B] only B and C
[C] only C and D
[D] only A and D
Which of the following pairs are correctly matched?
A) Hirudinaria Suckers
B) Obelia Metagenesis
C) Enterobius Schizocoelom
D) Unio Ctenidia
[A] Only A, B and D
[B] Only A and D
[C] Only B, C and D
[D] Only A and B
Sycon belongs to a group of animals, which are best described as
[A] unicellular or acellular
[B] multicellular without any tissue organization
[C] multicellular with a gastrovascular system
[D] multicellular having tissue organization, but no body cavity
Which of the following have porous body and are diploblastic?
[A] Aurelia and Obelia
[B] Adamsia and Euplectella
[C] Leucosolenia and Spongilla
[D] Sycon and Hydra
Canal system in Porifera is not concerned with
[C] sexual reproduction
[D] none of these
During unfavourable conditions, the sponges form
Which of the following cell type is capable of giving rise to other cell types in sponges?
Food storage in Leucosolenia occur by
Which cells are found only in sponges?
[A] Amoeboid cells
[C] Pigment cells
[D] Gland cells
What is left when bath sponges dries up?
[B] spongin fibres
The formation of canal system in sponges is due to
[B] porous walls
[C] folding of inner walls
[D] gastro-vascular system
Which one of the following is a fresh water sponge ?
A sponge differs form all other matazonas in having
[A] Nerve cells
[B] Absence of blood
[C] Numerous mouthlets and one exit
[D] None of these
Which of the following is correct about nematocyst?
[A] it can be re-used
[B] its ejection is a conditioned reflex
[C] it is ejected on contact and pierce the prey
[D] due to which other Hydra doesn’t come in contact with it
Hydra can paralyse prey by
[D] none of these
Ephyra is the stage in the life cycle of
[D] sea anemone
Ephyra is the larva of
[A] sea anemone
The characteristic larva of phylum ‘Coelenterata’ is
‘Sea fan’belongs to