Organism which axhibit only polyp form is 6.
6. Which of the following is not a featura of
(1) Aurela (2) Obelia ctenophores?
(3) Adamsia (4) Both (2) and (3) (1) Prosence of stalocyst al aboral end
Pinacoderm in spongos is made by (2) Al ctenophores aro hermaphrodita
(1) Pinacocytes (3) Internal fertilization
(2) Porocytes (4) Presence of bioluminescence property
(3) Amoebocyles
7. Choose the corract statomant w.r.t. poriferans.
14) Both (1) & (2
Amphiblastula is (1) Gemnmule is an asoxual reproductive structure
which devoiops insido the body
(1) Solid larva of Leucosolenia
(2) Hollow larva of Sycon (2) They are classified into three classes basod on
symmetry and locomolory structures
(3) Hollow larva of Leucosolenia
3) Calcarea and hoxactinellida animals are
(4) Solld larva of Spongile
Bxclusivaly marine and are found in deep sea
Digestion in Hydra occurs
(1) Intracellularly in gastrodermal calls only (4) Demospongiae animals occur exclusively in
fresh water
(2) Extracellularly in gastro-vascular cavity followed
by intracellular digestion within gastrodermal 8 Lasso cells are prosent in
cells
(1) Physalia
(3) Extraoellulerly in gastrovascular cavity only (2) Cliona
(4) Intracellularly in gastrodermal calls followed by
extracellular digestion in coelenteron (3) Gorgonia
Euplectella (4) Ctenoplana
of siliceous spicules which are
(1) Has skeleton 9. Which group of animals
Iriaxon with three rays belongs to same class?
(2) Lives in com:mensal relationship with certain (1) Obelia, Physalia, Gorgonia
shrimps (2) Pennalula, Metridium, Ctenoplana
(3) Belongs lo class calcisponglae
(3) Euspongia, Spongilla, Cliona
(4) Is exclusively freshwater and are mosty found
in shallow wa:er (4) Sycon, Grantia, Euplectella