Biology : Evolution

Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter?

• Microbes did not appear in stored meat

• Larvae could appear in decaying organic matter

• Microbes appeared from unsterilized organic matter

• Meat was not spoiled, when heated and kept sealed in a vessel

Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution?

• Development of transgenic animals

• Production of 'Dolly' the sheep by cloning

• Prevalence of pesticide resistant insects

• Development of organs from 'stem cells' for
  organ transplantation

Which have not left any evidences of organic evolution

• Archaeopteryx

• Cow

• Peripatus

• Neopilina

There are two opposing views about origin of modern man. According to one view Homo erectus in Asia were the ancestors of modern man. A study of variations of DNA however suggested African origin of modern man. What kind of observation on DNA variation could suggest this?

• Greater variation in Africa than in Asia

• Variation only in Asia and no variation in Africa

• Greater variation in Asia than in Africa

• Similar variation in Africa and Asia

Which of the following is not vestigial in man?

• Tail vertebrae

• Nails

• Nicitating membrane

• Vermiform appendix

Mesozoic era is Golden period of

• reptiles

• Mollusca

• fishes

• amphibians

In Ornithine cycle, which of the following wastes are removed from the blood?

• Urea and urine

• Ammonia and urea

• CO₂ and ammonia

• CO₂ and urea

Organs which differ in origin but perform similar functions

• analogous

• homologous

• vestigial

• all of these

Presence of tail in a child is an example of

• atavism

• divergent evolution

• convergent evolution

• mutation

Pneumatic bones are expected to be found in

• house lizard

• flying fish

• pigeon

• tadpole of frog