176) Percentage composition of Calcium (by mass) in organism is:
a) 6
b) 2
c) 9
d) 8
177) Percentage composition of Phosphorous (by mass) in organism is:
a) 1
b) 3
c) 5
d) 6
178) Percentage composition of trace elements (by mass) in organism is:
a) 1
b) 3
c) 5
d) 7
179) Which of the following is trace element in protoplasm?
a) carbon
b) Hydrogen
c) zinc
d) oxygen
180) Which of the following is trace element in protoplasm?
a) carbon
b) Hydrogen
c) chlorine
d) oxygen
181) Which of the following is trace element in protoplasm?
a) carbon
b) Hydrogen
c) sodium
d) oxygen
