Assertion (A): Forelimbs of humans and bats are homologous.
Reason (R): Forelimbs of humans and bats have similar anatomical structure.
In the light of the above statements, choose the most appropriate answer from the options given below:
Human and bat forelimbs have the same basic anatomical plan due to common ancestry. They are homologous organs that have evolved to perform different functions.
Which of the following is not an example of convergent evolution?
Forelimbs of whales and bats are homologous organs that evolved from a common ancestor, representing divergent evolution. The other examples are analogous organs showing convergent evolution.
Match List-I with List-II with respect to chronology of evolution of life forms:
List-I
List-II
A. About 65 mya
I. Jawless fish probably evolved
B. About 500 mya
II. The dinosaurs suddenly disappeared from the earth
C. About 350 mya
III. Seaweeds and few plants probably existed
D. About 320 mya
IV. Invertebrates were formed and became active
Dinosaurs disappeared about 65 mya. Invertebrates became abundant about 500 mya. Jawless fishes evolved about 350 mya. Seaweeds and early plants existed about 320 mya.
Evolution of human appears parallel to the progressive development of brain and language skills. As such, the evolution of individual species in the sequence of their appearance is:
According to NCERT, the evolutionary sequence is Ramapithecus → Homo habilis → Homo erectus → Neanderthal man → Homo sapiens.
