Subject - General Science
Chapter - The Nervous System

1. Consider the following statements

i) Coelenterates, cnidarians & Echinoderms have their neurons organised into a nerve net.

ii) These creatures have radial symmetry & lack a head.

iii) Although lacking a brain a central nervous system they are capable of complex behaviour.

which of the above statements is/are false?

a) i only
b) ii & iii only
c) All of the above
d) None of the above

2. Consider the following statements :

i) Flatworms have neurons associated into cluster known as ganglia which form a small brain.

ii) Vertebrates have a spinal cord in addition to a more developed brain.

iii) Chordates have a dorsal rather than what nervous system.

which of the following is/are true ?

a) i & iii only
b) ii  only
c) iii  only
d) All of the above

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