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We know that plants require nutrients. If we supply these in e
Biology Exemplar
Biology Exemplar

Class 11

NCERT Exemplar

Publisher:
NCERT
Subject:
Biology
1

Chapter 1: The Living World

37 questions

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2

Chapter 2: Biological Classification

33 questions

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3

Chapter 3: Plant Kingdom

28 questions

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4

Chapter 4: Animal Kingdom

45 questions

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5

Chapter 5: Morphology of Flowering Plants

42 questions

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6

Chapter 6: Anatomy of Flowering Plants

52 questions

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7

Chapter 7: Structural Organization in Animals

48 questions

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8

Chapter 8: Cell: The Unit of Life

39 questions

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9

Chapter 9: Biomolecules

31 questions

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10

Chapter 10: Cell Cycle and Cell Division

43 questions

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11

Chapter 11: Transport in Plants

66 questions

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12

Chapter 12: Mineral Nutrition

39 questions

Q1
With the help of examples describe the classification of essential elements based on the function they perform.
Q2
We know that plants require nutrients. If we supply these in excess, will it be beneficial to the plants? If yes, how/ if no, why? 
Q3
Trace the events starting from the coming in contact of Rhizobium to a leguminous root till nodule formation. Add a note on importance of leg haemoglobin. 
View all question
13

Chapter 13: Photosynthesis in Higher Plants

59 questions

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14

Chapter 14: Respiration in Plants

42 questions

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15

Chapter 15: Plant Growth and Development

48 questions

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16

Chapter 16: Digestion and Absorption

34 questions

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17

Chapter 17: Breathing and Exchange of Gases

32 questions

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18

Chapter 18: Body Fluids and Circulation

42 questions

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19

Chapter 19: Excretory Products and their Elimination

44 questions

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20

Chapter 20: Locomotion and Movement

39 questions

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21

Chapter 21: Neural Control and Coordination

31 questions

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22

Chapter 22: Chemical Coordination and Integration

39 questions

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Question
Hard
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Solving time: 4 mins

We know that plants require nutrients. If we supply these in excess, will it be beneficial to the plants? If yes, how/ if no, why? 

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Biology Exemplar (NCERT Exemplar)

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Plants can tolerate a specific amount of micronutrient. A slight lesser amount of it can cause deficiency symptom and a slight higher amount can cause toxicity. The mineral ion concentration which reduces the dry weight of a tissue by is called toxic concentration. This concentration is different for different micronutrients as well as for different plant, e.g., is toxic beyond for soyabean and beyond for sunflower.
It is very difficult to identify the toxicity symptoms of mineral ion. It is because excess uptake of one element can reduces the uptake of other element at a time.
e.g., manganese becomes toxic when absorbed by plants in higher amounts. The toxicity is expressed in form of brown spots surrounded by chlorotic vein.
It is due to the following
(i) Reduction in uptake of and .
(ii) Inhibition of binding of to specific enzymes.
(iii) Inhibition of translocation in shoot apex.
Thus, excess of causes deficiency of iron, magnesium and calcium.
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Practice more questions from Biology Exemplar (NCERT Exemplar)

Q1
With the help of examples describe the classification of essential elements based on the function they perform.
Q2
We know that plants require nutrients. If we supply these in excess, will it be beneficial to the plants? If yes, how/ if no, why? 
Q3
Trace the events starting from the coming in contact of Rhizobium to a leguminous root till nodule formation. Add a note on importance of leg haemoglobin. 
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Which one of the following statements can best explain the term critical concentration of an essential element?
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Match the column-I containing minerals with the functions given in column-II and choose the correct combination given.


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Question Text
We know that plants require nutrients. If we supply these in excess, will it be beneficial to the plants? If yes, how/ if no, why? 
TopicMineral Nutrition
SubjectBiology
ClassClass 11
Answer TypeText solution:1
Upvotes56