Question

Choose the odd one out and give reason for your choice

1) Urethra, ureter, bladder, cortex.
2) carbon dioxide, glucose, urea, uric acid.
3) cortex, medulla, pelvis, ureter.
4) kidney, skin, stomach, lung.
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Answer 1

Answer:

These would all be questions from 'Excretory System.'

1. Cortex is the odd one out here. It is also called renal cortex, and it is an internal part of the kidney, whereas urethra, ureter and urinary bladder are all independent structures.

2. Out of these four, glucose is the odd one out. The rest are all excretory products- CO2 from lungs, urea and uric acid using special excretory structures.

3. Here, ureter is the odd one out. All the rest are internal parts of a kidney whereas ureter is an independent structure.

4. Stomach is the odd one out, as the other body parts mentioned, all take part in excretion. Lungs expel carbon dioxide, skin expels sweat and sebum while the kidneys form urine.

Answer 2

2 is the odd one out because they are not organs of our body