Questions
1
Major part of dry weight of a plant is derived from elements obtained from
Answer: Air
6
In plant mineral nutrition, elements are called macro or micro-elements depending upon their
Answer: Relative amount required in plants
7
Tracer elements are those that are
Answer: Radioactive and can be used to investigate a process in the plant
8
Which of the following does not operate in the carrier concept of active absorption of minerals
Answer: Ascending water stream
9
Soil nitrate is more likely to leach than ammonium due to its
Answer: Negative charged
10
Nodule formation of legume roots is reduced during deficiency of
Answer: Both A and B
11
Internal cork of Apple/browning of Cauliflower is deficiency symptom of
Answer: B
13
Which of the following are the most abundant elements in the living cells
Answer: C, H, O and N
14
Mineral salts which are absorbed by the roots from the soil are in the form of
Answer: Very dilute solution
16
Which of the following elements is necessary for translocation of sugars in plants
Answer: Boron
17
Chlorosis in plants occur due to
Answer: Deficiency of Mg and Fe in the soil
18
Those elements whose absence prevent plants from completing its life cycle are called___________
Answer: Essential elements
19
Who proposed the idea of essential mineral nutrients of the plant?
Answer: Arnon and Stout
