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Why do gametes produced in large numbers in organisms exhibit
Biology Exemplar
Biology Exemplar

Class 12

NCERT Exemplar

Publisher:
NCERT
Subject:
Biology
1

Chapter 1: Reproduction in Organisms

48 questions

Q1
In the figure given below, mark the ovule and pericarp.
Q2
Why do gametes produced in large numbers in organisms exhibit external fertilisation?
Q3
Which of the following are monoecious and dioecious organisms?
a. Earthworm ______________
b. Chara ______________
c. Marchantia ______________
d. Cockroach _____________
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2

Chapter 2: Sexual Reproduction in Flowering Plants

52 questions

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3

Chapter 3: Human Reproduction

48 questions

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4

Chapter 4: Reproductive Health

37 questions

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5

Chapter 5: Principles of Inheritance and Variation

52 questions

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6

Chapter 6: Molecular Basis of Inheritance

71 questions

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7

Chapter 7: Evolution

52 questions

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8

Chapter 8: Human Health and Disease

70 questions

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9

Chapter 9: Strategies for Enhancement in Food Production

77 questions

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10

Chapter 10: Microbes in Human Welfare

59 questions

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11

Chapter 11: Biotechnology: Principles and Processes

48 questions

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12

Chapter 12: Biotechnology and its Applications

52 questions

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13

Chapter 13: Organisms and Populations

70 questions

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14

Chapter 14: Ecosystem

68 questions

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15

Chapter 15: Biodiversity and Conservation

61 questions

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16

Chapter 16: Environmental Issues

52 questions

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Question
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Why do gametes produced in large numbers in organisms exhibit external fertilisation?

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Biology Exemplar (NCERT Exemplar)

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Organisms that take part in such process produce large number of gametes because
(i)  In external fertilisation, there is a great chance that the sperm and the eggs released by the organisms can be affected by factors present in the environment like dessication, predators, etc. So, to make up for the high fatality rate of the gametes, the organism produces a lot of gametes.
(ii)  Producing large number of gametes increase the chance for at least some eggs and sperms to meet in the environment ensuring that atleast a stable number of offspring are able to survive and carry on.
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Q1
In the figure given below, mark the ovule and pericarp.
Q2
Why do gametes produced in large numbers in organisms exhibit external fertilisation?
Q3
Which of the following are monoecious and dioecious organisms?
a. Earthworm ______________
b. Chara ______________
c. Marchantia ______________
d. Cockroach _____________
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Question Text
Why do gametes produced in large numbers in organisms exhibit external fertilisation?
TopicReproduction in Organisms
SubjectBiology
ClassClass 12
Answer TypeText solution:1
Upvotes71