______ are believed to have common origin with annelids.
A. Nematods
B. Arthropods
C. Molluscs
D. None of these
______ are believed to have common origin with annelids. Read More »
Biology
Nervous system of nematods consists of?
A. Ventral nerve cord
B. Dorsal nerve cord
C. Lateral nerve cord
D. All of these
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All of the following are true for Platyhelminthes except
A. Flatwarms
B. Triploblastic
C. Coelomate
D. Bilateral symmetry
All of the following are true for Platyhelminthes except Read More »
Exoskeoeton of coelenterates terates is made up to
A. Calcium
B. Silica
C. Chitin
D. Both A & B
Exoskeoeton of coelenterates terates is made up to Read More »
Pseudocoelem develops from
A. Blastopore
B. Plastoquinone
C. Blastocoel
D. Splitting of mesoderm
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Excretory system of platyhlminthes consists of
A. Nephridia
B. Flame cells
C. Malpighian tubules
D. Nephrons
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All of the following coelenterates show alternation of generation except
A. Hydra
B. Obelia
C. Aurelia
D. None of these
All of the following coelenterates show alternation of generation except Read More »
Enteron in coelenterates acts as_
A. Digestive cavity
B. Body cavity
C. Transporting cavity
D. all of these
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Porifera range in size from
A. Few millimeter wide to more than one meter tall
B. Few centimeter wide to more than one meter tall
C. Few decimeter wide to more than one meter tall
D. One meter wide to more than millimeter tall.
Porifera range in size from Read More »