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6.Evolution
easy
Definitions / Explanation : Homology & Adaptive radiation or divergent evolution
Option A
Option B
Option C
Option D
Solution
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).
Standard 12
Biology
Similar Questions
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 |
medium
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. |
easy
medium