Plant Nutrition – Old Year Questions

1. The maximum amount of water, which plants need to grow, is absorbed by the following :

(a) Embryonic zone
(b) Growing point
(c) Zone of elongation
(d) Root hairs

[U.P.P.C.S. (Mains) 2007]


2. When the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up or dies because –

(a) Water from soil cannot rise to aerial parts
(b) Roots are starved of energy
(c) Tree is infected by the soil microbes
(d) Roots do not receive oxygen for respiration

[I.A.S. (Pre) 2011]


3. Water is conducted in vascular plants by-

(a) Phloem tissue
(b) Parenchyma tissue
(c) Meristems
(d) Xylem tissue

[53rd to 55th B.P.S.C. (Pre) 2011]


4. The ‘xylem’ in plants is responsible mainly for –

(a) Transportation of food
(b) Transportation of amino acid
(c) Transportation of water
(d) Transportation of oxygen

[U.P.P.C.S. (Pre) (Re. Exam) 2015]


5. Water in plants is transported by :

(a) Xylem
(b) Epidermis
(c) Phloem
(d) Cambium
(e) None of the above/More than one of the above

[66th B.P.S.C. (Pre) (Re. Exam) 2020]


6. ‘Phloem’ in plants is mainly responsible for –

(a) Transportation of food
(b) Transportation of amino acid
(c) Transportation of oxygen
(d) Transportation of water

[U.P. Lower Sub. (Pre) 2015]


7. Which of the living tissues acts as the carrier of organic nutrients in higher plants ?

(a) Xylem
(b) Phloem
(c) Cortex
(d) Epidermis

[U.P.P.C.S. (Mains) 2012]


8. Which of the following elements is not essential for plant growth?

(a) Sodium
(b) Potassium
(c) Calcium
(d) Magnesium

[Uttarakhand P.C.S. (Pre) 2005]


9. Which of the following is macronutrient in relation to growth of plants?

(a) Potassium
(b) Zinc
(c) Boron
(d) Chlorine

[Chhattisgarh P.C.S. (Pre) 2020]


10. Which of the following elements is NOT a micronutrient in plants?

(a) Iron
(b) Manganese
(c) Copper
(d) Magnesium

[U.P. B.E.O. (Pre) 2019]

11. Which one of the following is not an essential nutrient for plants?

(a) Boron
(b) Potassium
(c) Sodium
(d) Magnesium

[I.A.S. (Pre) 1996]


12. Which of the following nutrient is most useful for enhancing oil content in mustard crop?

(a) Calcium
(b) Sulphur
(c) Zinc
(d) Iron

[U.P. R.O./A.R.O. (Pre) 2021]


13. Which of the following nutrient is necessary for ‘Nodule Formation’ in legumes?

(a) Nitrogen
(b) Silicon
(c) Boron
(d) None of the above

[U.P. B.E.O. (Pre) 2019]


14. Identify parasite in the following?

(a) Pitcher plant
(b) Cuscuta
(c) Bladderwort
(d) Sunf ower

[R.A.S./R.T.S. (Pre) 1997]


15. Consider the following statements :
Assertion (A) : Cuscuta (Amarbel) is an example of
parasitic angiosperm.
Reason (R) : It gets its nutrition from the leaves of
the host plant.
Choose your answer from the code given below :

(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) Assertion (A) is false, but (R) is true.
(d) Assertion (A) is true, but (R) is false.

[U.P. R.O./A.R.O. (Pre) 2016]


16. Crop logging is a method of –

(a) Soil fertility evaluation
(b) Plant analysis for assessing the requirement of nutrients for crop production
(c) Assessing of crop damage
(d) Testing suitability of fertilizers

[U.P.P.C.S. (Pre) 2006]