Question

Choose the odd one out and give scientific reasons for your choice: [10]

i) Spinal cord, cerebrum, cerebellum, medulla oblongata.

ii) Axon, cerebellum, cell body, dendrites.

iii) Skin, lungs, heart, liver, kidneys.

iv) Water, carbon-dioxide, urea, oxygen.

v) Nephrons, glomerulus, renal tubules, alveoli.​

Answer 1

Question

i)Spinal cord, cerebrum, cerebellum, medulla oblongata.

Answer

Spinal cord is the odd one in this series because all the rest are parts of brain.

Question

ii) Axon, cerebellum, cell body, dendrites.

Answer

Cerebellum is the odd one in this series because all the rest are parts of  Neuron while cerebellum is the part of brain.

Question

iii) Skin, lungs, heart, liver, kidneys.

Answer

Skin is the odd one in this series because all the rest are internal organ while skin is an external organ.

Question

iv) Water, carbon-dioxide, urea, oxygen.

Answer

Urea is the odd one in this series because it is the only nitrogenous waste in this series.

Question

v) Nephrons, glomerulus, renal tubules, alveoli.​

Answer

Alveoli is the odd one out because it is located in lungs while all the rest are located in the kidneys .