Phylum Echinodermata: Class Asteroidea
Class Asteroidea have approximately
1200 members
1600 members
1500 members
1800 members
1500 members
Related posts
Strands of tissue, which run circularly around mouth beside ring canal, extends aborally into arms, is termed as:A. circular muscles
B. hemal system
C. ringed structure
D. symmetry
A series of Ossicles that runs length of oral surface of arm is called:
A. pedicellariae
B. disk
C. arms
D. ambulacral groove
Each arm of sea star consist of:
A. 2 gonads
B. 2 testes
C. 2 openings
D. radial canals
Process in which sea stars regenerate their lost body part is called:
A. mitosis
B. reproduction
C. regeneration
D. formation
Thin folds of body wall that helps in gas exchange and extends in Ossicles are called:
A. pedicellariae
B. dermal branchiae
C. disk
D. arms
Some species of echinoderms i.e. sea star has pincher like structure are called:
A. pedicellariae
B. dermal branchiae
C. arms
D. disk
Bilaterally symmetrical larva in class Asteroidea is named as:
A. bipinnaria larva
B. Muller’s larva
C. planula
D. tadpole
Leave a Reply