The skeleton of the sponges is in the form of variously shaped needle like structures called___________?
(A) Stripules
(B) Spicules
(C) Brails
(D) Spines
The internal buds are known as__________?
(A) Spicules
(B) Choanocytes
(C) Gemmules
(D) None of these
Venus flower basket is also known as___________?
(A) Sycon
(B) Euplectella
(C) Leucoselenia
(D) Spongilla
In acoelomates gut is ________ in origin.
(A) Ectodermal
(B) Endodermal
(C) Mesodermal
(D) None of these
The system well developed in the acoelomate is___________?
(A) Excretory system
(B) Nervous system
(C) Transport system
(D) All of these
In sponges fertilization takes place in____________?
(A) Ectoderm
(B) Mesenchyme
(C) Endoderm
(D) Uterus
80% of the food of sponges consists of__________?
(A) Detrital organic particles
(B) Zooplankton and small animals
(C) Phytoplanktons
(D) all of these
The single main opening of the sponge cavity is____________?
(A) Osculum
(B) Ostia
(C) Spongocoel
(D) None of these
Sperms released in water are carried to the mesenchyme in sponges by__________?
(A) Amoeboid cell
(B) Stipules
(C) Spicules
(D) Spines
The skeleton of sponges is made up of___________?
(A) Calcium
(B) Silica
(C) Both of these
(D) None of these