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KCET 2020 Biology Solved Paper
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Question : 29
Total: 60
The element whose percentage weight is highest in both Earth's crust and human body is
calcium
hydrogen
carbon
oxygen
Validate
Solution:
The following are the percentage of some elements in Earth's crust and the human body:
Element
% Weight of
Earth’s crust
Human body
Hydrogen (H)
0.14
0.5
Carbon (C)
0.03
18.5
Oxygen (O)
46.6
65.0
Nitrogen (N)
Very little
3.3
Sulphur (S)
0.03
0.3
Sodium (Na)
2.8
0.2
Calcium (Ca)
3.6
1.5
Magnesium (Mg)
2.1
0.1
Silicon (Si)
27.7
Negligible
From the above-given table, it can be inferred that oxygen is the element which is most abundant in both humans as well as Earth's crust.
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