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Biology Class 12th chapter 1, Reproduction In Organisms very short summary. $7.99   Add to cart

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Biology Class 12th chapter 1, Reproduction In Organisms very short summary.

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Chapter 1: Reproduction in Organisms (Biology, Class 12) This chapter explores the various modes of reproduction in organisms, including both asexual and sexual reproduction. It covers the life cycle stages—juvenile, reproductive, and senescence—and the key events in sexual reproduction like...

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  • August 16, 2024
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  • 2023/2024
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  • Secondary school
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Chapter 1: Reproduction in Organisms (Very Short Notes)


Reproduction: An organic process of having offspring or multiplying in number.



Types of Reproduction:

Asexual Reproduction: Having a single parent, with no gamety formation and
genetically identical offsprings.

Examples: Binary fission, budding, fragmentation, spore formation, vegetative
propagation.

Sexual Reproduction: This involves two parents where there is the formation of
gametes and thereby genetic variability among their offsprings.



Life Span: It refers to the duration between an organism’s birth and natural
death; which varies depending on a species; the longest life span of helix pomatia
is 15 years.



Phases of Life Cycle:

Juvenile Phase: Period between birth and maturity characterized by growth
increase accompanied by differentiation to form organs specific for a particular
function.

Reproductive Phase: This comes after juvenile phase and signifies that the
organism has reached sexual maturity.

Senescence: This starts when an individual begins to age and ends with death like
other animals too that are getting older until they die due to different sorts of
factors or reasons such as diseases or violence caused by some predator or
parasites if any developed at this time stage.

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