Sample Materials for CSAT Paper -1 (G.S.) Pre 2013: “General Science – The Nervous System”

1. Coelenterates, cnidarians & Echinoderms have their neurons organised into a nerve net.
2. These creatures have radial symmetry & lack a head.
3. Although lacking a brain a central nervous system they are capable of complex behaviour.

Which of the statement given above is / are false.

1. 1 only
2. 2 & 3 only
3. All of the above
4. None of the above

1. Flatworms have neurons associated into cluster known as ganglia which form a small brain.
2. Vertebrates have a spinal cord in addition to a more developed brain.
3. Chordates have a dorsal rather than what nervous system.

Which of the statement given above is / are false.

1. 1 & 3 only
2. 2 only
3. 2 only
4. All of the above