Tag: CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts

Match the organisms in column A with their status in Column B. (1) A, C are X; B, D are Y (2) A, D are X; B, C are Y […]

Given below are statements on “living fossils’. Select the correct statements. (1) Living fossils are impressions of extant organisms in old rocks. (2) Living fossils show high morphological divergence from […]

During evolution the limbs of snakes were lost. Thecorrect explanation for this is (1) Limbs degenerated due to disuse (2) This was more adapted (3) Limbs reduced the fitness of […]

Pelvic girdle and hind limbs in python are example of- (1) Analogous organ (2) Homologous organ (3) Vestigial organ (4) Orthologous organ Introduction The python, a member of the snake […]

Convergent evolution creates: (1) Analogous structures (2) Homologous structures (3) Synapomorphies (4) Pleiotropic structures Introduction Evolution is a powerful force shaping the diversity of life on Earth. One of its […]

Which of the following is an example of convergent evolution (homoplasy)? (1) The wings of birds and bats (2) The hemoglobin gene family (3) The ribosomal RNA genes (4) The […]

Fossils of the same species of fresh water reptiles have been found in South America and Africa. Based on the current understanding. Which of the following is the best possible […]

Tigers do not occur in Sri Lanka while they are seen India. While the leopards are seen in both India and Sri Lanka. The main reason is (1) Tigers are […]

The flightless birds ostrich, rhea and emu are distributedon different continents. What is the most plausibleexplanation that is given by an evolutionary biologist for this discontinuous observation? (1) The birds were […]

Creationism is rejected by evolutionary biologists because (1) it offers no explanation about the origin of adaptation (2) it suggests that all species descended from a common ancestor (3) theologians […]