Definitions / Explanation : Homology & Adaptive radiation or divergent evolution
Definitions / Explanation : Homology & Adaptive radiation or divergent evolution
It is the similarity between organs of different animals based on common ancestry or common embryonic origin and built on the same fundamental pattern but perform varied functions and have different appearance e.g. Seal flipper and forelimbs of birds, bat, horse and human look different, perform different functions but exhibit same structural plan.
It represents evolution of new forms in several directions from the common ancestral type (divergence).
Similar Questions
Identify correct pair
Match the columns :
Column - $I$
Column - $II$
$(1)$ Mutation
$(a)$ Change in population allele frequencies due to chance alone.
$(2)$ Gene flow
$(b)$ Difference insurvival and reproduction
$(3)$ Natural selection
$(c)$ Immigration, emigration change allele frequencies.
$(4)$ Genetic drift
$(d)$ Source of new alleles.
Match the columns :
| Column - $I$ | Column - $II$ |
| $(1)$ Mutation | $(a)$ Change in population allele frequencies due to chance alone. |
| $(2)$ Gene flow | $(b)$ Difference insurvival and reproduction |
| $(3)$ Natural selection | $(c)$ Immigration, emigration change allele frequencies. |
| $(4)$ Genetic drift | $(d)$ Source of new alleles. |
Match List $- I$ with List $- II.$
List $- I$
List $- II$
$(a)$ Adaptive radiation
$(i)$ Selection of resistant varieties due to excessive use of herbicides and pesticides
$(b)$ Convergent evolution
$(ii)$ Bones of forelimbs in Man and Whale
$(c)$ Divergent evolution
$(iii)$ Wings of Butterfly and Bird
$(d)$ Evolution by anthropogenic action
$(iv)$ Darwin Finches
Choose the correct answer from the options given below.
$(a)- (b)- (c)- (d)$
Match List $- I$ with List $- II.$
| List $- I$ | List $- II$ |
| $(a)$ Adaptive radiation | $(i)$ Selection of resistant varieties due to excessive use of herbicides and pesticides |
| $(b)$ Convergent evolution | $(ii)$ Bones of forelimbs in Man and Whale |
| $(c)$ Divergent evolution | $(iii)$ Wings of Butterfly and Bird |
| $(d)$ Evolution by anthropogenic action | $(iv)$ Darwin Finches |
Choose the correct answer from the options given below.
$(a)- (b)- (c)- (d)$
- [NEET 2021]
$A$ : During evolution pouched mammals of Australia survived.
$R$ : Due to lack of competition from any other mammal due to continental drift
$A$ : During evolution pouched mammals of Australia survived.
$R$ : Due to lack of competition from any other mammal due to continental drift
Match the following.
Column $- I$
Column $- II$
$(A)$ Lamark
$(p)$ Finch bird
$(B)$ De Vries
$(q)$ Evening primerose
$(C)$ Darwin
$(r)$ Giraffes
$(s)$ Melanic moths
Match the following.
| Column $- I$ | Column $- II$ |
| $(A)$ Lamark | $(p)$ Finch bird |
| $(B)$ De Vries | $(q)$ Evening primerose |
| $(C)$ Darwin | $(r)$ Giraffes |
| $(s)$ Melanic moths |