The sponges in which sperms develop first are included in the category of__________?
(A) Peritandrous
(B) Pertandrous
(C) Protendrous
(D) Protandrous
A sponge of Antarctica which is more than a meter tall is____________?
(A) Scolymastra joubini
(B) Euplectella
(C) Spongilla
(D) Leucoselenia
The function of coelom is__________?
(A) To increase the size of the animals
(B) To help in the functioning of reproductive system
(C) To provide space for the development of organs and systems
(D) None of these
In most triploblasts after embryonic development the three layers are represented as___________?
(A) Separate layers of cells
(B) Structures formed from them
(C) Structures associated with them
(D) Their functions in body
Of the following which one is not found in series proterostomia?
(A) Annelida
(B) Arthropoda
(C) Mollusea
(D) Echinodermata
Of the following which one is not the characteristic of Kingdom Animalia.
(A) All animals are ingestive heterotrophs
(B) All animals are eukaryotes
(C) All animals develop from the dissimilar gametes i.e. large sperm and small egg.
(D) It is largest kingdom.
_______ are the first group of invertebrates which have developed a closed circulatory system.
(A) Nematods
(B) Annelids
(C) Arthropods
(D) Molluscs
Main blood vessel of arthropods usually:
(A) Lies on dorsal side
(B) Lies on ventral side
(C) Lies on lateral side
(D) Is not present
Second largest phylum of invertebrates is____________?
(A) Porifera
(B) Arthropoda
(C) Mollusca
(D) Chordata