A : Leguminous plant are grown between crops to increase yeild.
R : Rizobium bacteria are present in the root - nodules of Leguminous plant
A. Both A and R are true, & R gives correct explanation of A.
B. Both A and R are true, but R is not correct explanation of A.
C. A is true, but R is wrong.
D. A is wrong, but R is true.
Answer : Option A
32. Which element is required for photolysis of water during photosynthesis ?
33. Which element is necessary for meristmatic tissue and differentiating tissues ?
Which one is correct option of given Column I and Column II
Column I Column II
1 Copper P. Maintenance of ribosomal constitution.
2 Molybdenum Q. Carbohydrate transport
3 Zinc R. Nitrogen fixation
4 Magnesium S. Activity of enzymes in respiration
5 Boron T. Auxin synthesis
A. 1 - S, 2 - R, 3 - P, 4 - Q, 5 - T
B. 1 - S, 2 - R, 3 - T, 4 - P, 5 - Q
C. 1 - R, 2 - P, 3 - S, 4 - T, 5 - Q
D. 1 - T, 2 - S, 3 - Q, 4 - R, 5 - P
Answer : Option B
35. The absorption, distribution and metabolism of various mineral elements is called .....
A. dispersal of mineral
B. Absorption of mineral salts
C. mineral metabolism
D. mineral nutrition
Answer : Option D
Elements and its deficiency symptoms are given in Column I and Column II
Column I Column II
1 P a. Accumulation of purple pigments.
2 Cl b. discolored tubers and roots.
3 Mo c. Wilting of stubby roots.
4 B d. Pale green leaves with rolled margins.
5 S e. purple blots occur on leaf surface.
A. 1- a, 2 - d, 3 - b, 4 - c, 5 - e
B. 1- d, 2 - c, 3 - a, 4 - b, 5 - e
C. 1- e, 2 - c, 3 - d, 4 - b, 5 - a
D. 1- e, 2 - c, 3 - b, 4 - d, 5 - a
Answer : Option C
Which are criteria for Essentiality of Elements.
Choose the correct sentences from given sentences.
(i) A plant must be unable to complete its life cylce in the absence of the mineral element.
(ii) The function of the element must not be replaceable by another mineral element.
(iii) All minerals which are absorbed by plants are not essential minerals
In the following statements which option is correct for toxicity levels of elements.Statements
(A) Toxicity levels for any elements may inhibit the uptake of another element.
(B) Low concentration of Mn may cause deficiencies of Mg and Ca.
(C) A moderate increase toxicity are difficult to identify.
A. AWhich is the correct path of transport of mineral nutrients from roots ?
B. A and C
C. all
D. B and C
Answer : Option A
39. Which is the correct path of transport of mineral nutrients from roots ?
A. Root epidernal layer --> endodermis --> cortex --> Pericycle --> xylem tissue
B. Root epidernal layer --> cortex --> endodermis --> xylem tissue --> Pericycle
C. Root epidernal layer --> cortex --> endodermis --> Pericycle --> xylem tissue
D. Root epidernal layer --> Pericycle --> cortex --> endodermis --> xylem tissue
Answer : Option C
From the given statements for transport of mineral elements which are correct one ?
(i) Transport of mineral ions takes place by symplastic and Apoplastic path.
(ii) Mineral ions absorbed by roots first enters in the cortex then through pericycle and endodermis enters into xylem units.
(iii) Water and mineral ion transpotation are interlinked with each other.
(iv) Transport of mineral elements in xylem takes place with water only.