182) Which of the following is trace element in protoplasm?
a) carbon
b) manganese
c) Hydrogen
d) oxygen
183) Which of the following is trace element in protoplasm?
a) carbon
b) Hydrogen
c) copper
d) oxygen
184) Which of the following is trace element in protoplasm?
a) iodine
b) Hydrogen
c) carbon
d) oxygen
185) Which of the following is trace element in protoplasm?
a) carbon
b) Hydrogen
c) oxygen
d) iron (Fe)
186) Which of the following is trace element in protoplasm?
a) carbon
b) Hydrogen
c) magnesium (Mg)
d) oxygen
187) Atoms combines through chemical bonds and form………….
a) molecules
b) cell
c) mixture
d) solution
