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
C.
CO2 and ammonia
Mammals are ureotelic organisms. In these organisms, ammonia gets deposited in the mitochondria of liver cells and gets converted into urea in the Ornithine cycle or Urea cycle.
Urea production occurs in liver and passes into the bloodstream and then to kidneys. CO2 is also excreted during the process.
Which of the following is not vestigial in man?
Tail vertebrae
Nails
Nicitating membrane
Vermiform appendix
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 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
Presence of tail in a child is an example of
atavism
divergent evolution
convergent evolution
mutation
Organs which differ in origin but perform similar functions
analogous
homologous
vestigial
all of these
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
