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Why nephridia in earthworm that are basically similar in struc
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

Q1
Correct the wrong statements among the following.
Q2
Why nephridia in earthworm that are basically similar in structure classified into three types? Mention the names of each.
Q3
Common name of some animals are given in column I, write their scientific name in column II
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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

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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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Why nephridia in earthworm that are basically similar in structure classified into three types? Mention the names of each.

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Why nephridia in earthworm that are basically similar in structure classified into three types? Mention the names of each.
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Nephridia are the main excretory organs in earthworms. They are associated with excretory and osmoregulatory functions. The nephridia occur in all segments of earthworm except the first two segments. The three types of nephridia are found in earthworm according to their location. 
They are distinguished on the basis of being enteronephric (nitrogen waste expelled input) and exonephric (nitrogen waste discharged outside directly).
Solution Image
Septal Nephridia: These are present on both sides of inter segmental septa of the segment starting from 15th to the last that open into intestine. They are enteronephric. Integumenatry Nephridia: These are attached to lining of the body wall of segment 3 to the last that open on the body surface. They are exonephric.
Pharyngeal Nephridia: These are present as a three paired tufts in the 4th, 5th and 6th segments. They are also enteronephric. 
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Question Text
Why nephridia in earthworm that are basically similar in structure classified into three types? Mention the names of each.
TopicStructural Organization in Animals
SubjectBiology
ClassClass 11
Answer TypeText solution:1
Upvotes104