A population of finch birds with medium sized beaks colonizes an island with plants producing medium and large sized seeds. After a disease wipes out all the plants with medium sized seeds, what is most likely to happen to the finches?
Important Questions on Evolution
Read the following statements:
(i) When reptiles came down mammals took over this earth.
(ii) Around 65 million years ago, some land reptiles went back to water and evolved into fish-like reptiles, called Ichthyosaurs.
(iii) Dinosaurs became extinct 200 million years ago.
(iv) The first mammals were like shrews.
Which of the above statements are incorrect?
Reason (R) Adaptive forms of a given trait tend to become more common. Less adaptive ones become less common or disappear.
Consider the following statements and select the correct option stating which one is true (T) and which one is false (F).
(i) Tyrannosaurus was the biggest dinosaur about feet in height and had huge fearsome dagger–like teeth.
(ii) Some land reptiles went back into water to evolve into fish–like reptiles probably million years ago.
(iii) According to the theory of spontaneous generation, “panspermia” was transferred to different planets from outer space, including earth.
(iv) According to Darwin, there has been gradual evolution of life forms.
(v) Homology is based on convergent evolution, while analogy refers to a situation exactly opposite.
