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1. The basic unit of the nervous system is
A. Brain
B. Spinal cord
C. Neuron
D. Muscle cell
2. Which receptor detects taste?
A. Olfactory receptor
B. Gustatory receptor
C. Photoreceptor
D. Thermoreceptor
3. The gap between two neurons is called
A. Axon
B. Synapse
C. Dendrite
D. Cell body
4. Reflex arcs are formed in
A. Brain
B. Spinal cord
C. Muscles
D. Heart
5. Which part of the brain is responsible for voluntary actions?
A. Hind-brain
B. Fore-brain
C. Mid-brain
D. Medulla
6. Which part of the brain maintains posture and balance?
A. Cerebellum
B. Cerebrum
C. Medulla
D. Hypothalamus
7. The medulla controls
A. Smell
B. Vision
C. Involuntary actions
D. Memory
8. The region in the brain portion that controls hunger is
A. Medulla
B. Midbrain
C. Hypothalamus
D. Cerebrum
9. The brain is protected by
A. Ribs
B. Cartilage
C. Skull and fluid-filled balloon
D. Muscles
10. Spinal cord is protected by
A. Skull
B. Backbone
C. Ribs
D. Cartilage
11. Plant movement due to growth is called
A. Tropic movement
B. Nastic movement
C. Reflex movement
D. Voluntary movement
12. Which movement in plants is independent of growth?
A. Tropic movement
B. Folding of Mimosa leaves
C. Phototropism
D. Geotropism
13. Upward growth of shoots is an example of
A. Hydrotropism
B. Geotropism
C. Chemotropism
D. Nastic movement
14. Growth of pollen tube towards ovule is an example of
A. Geotropism
B. Chemotropism
C. Hydrotropism
D. Phototropism
15. Gibberellins are responsible for
A. Growth of stem
B. Root bending
C. Leaf wilting
D. Inhibition of growth
16. Cytokinins mainly promote
A. Cell division
B. Cell elongation
C. Seed dormancy
D. Leaf fall
17. Abscisic acid causes
A. Stem elongation
B. Fruit growth
C. Wilting of leaves
D. Root bending
18. The hormone secreted by adrenal glands during stress is
A. Insulin
B. Adrenaline
C. Thyroxin
D. Testosterone
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