#Divergent vs Convergent Evolution #class 12th Biology@Dr.Mkg Transformation.

Divergent vs Convergent Evolution

Class 12th Biology | By Dr. Manoj Giri Sir @Dr.mkg Transformation
1. Divergent Evolution (विभेदी उत्क्रांति)

Simple Explanation:

When one ancestral species splits into two or more new species, and they start becoming different from each other as they adapt to different environment Common ancestor Different structures and functions

Key Features:

Shows homologous organs

Same basic structure, different functions

Occurs due to adaptive radiation
Examples:

Darwin’s finches (different beaks from one ancestor)

Forelimbs of humans, whales, bats (same origin, different use)
2. Convergent Evolution (संगमि उत्क्रांति)

Simple Explanation:

When unrelated species (no recent common ancestor) evolve similar features because they live in similar environments or face similar challenges.

Different ancestors Similar structures and functions

Key Features:

Shows analogous organs

Different structure, same function

Happens due to similar environmental pressure
Examples:

Wings of birds, bats, and insects (function same: flying)

Eyes of octopus and mammals

Cactus (America) and Euphorbia (Africa) — similar appearance but unrelated
Difference Between Divergent and Convergent Evolution

Feature Divergent Evolution Convergent Evolution

Origin Same ancestor Different ancestors
Outcome Becomes different Becomes similar
Organs Homologous organs Analogous organs
Cause Different environments Similar environments
Examples Finches, vertebrate limbs Wings, cactus & euphorbia

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