Variations arise either because of errors in DNA copying, during asexual reproduction, which will be fewer; or because of fusion of gametes from two individuals in sexual reproduction. Since, in sexual reproduction, gametes from two different individuals with different genetic make up, are involvedRead more
Variations arise either because of errors in DNA copying, during asexual reproduction, which will be fewer; or because of fusion of gametes from two individuals in sexual reproduction. Since, in sexual reproduction, gametes from two different individuals with different genetic make up, are involved so variations are much higher.
this was given by fool-proof experiment by Urey and miller 1953. They simulated the conditions present on primitive earth, in a flask. This contained reducing gases like methane, hydrogen sulphide, hydrogen, carbon etc. The temperature, just below 100 degree c was maintained and current was passed.Read more
this was given by fool-proof experiment by Urey and miller 1953. They simulated the conditions present on primitive earth, in a flask. This contained reducing gases like methane, hydrogen sulphide, hydrogen, carbon etc. The temperature, just below 100 degree c was maintained and current was passed. At the end of a week, it was found that simple biomolecules were formed that included amino acids. This proved that in this manner, biomolecules would have come together and life originated.
Study of fossils helps us to know as to how character/features have evolved in different groups of organisms. We also can find out which organism evolved earlier, and from common ancestors, based on common features.
Study of fossils helps us to know as to how character/features have evolved in different groups of organisms. We also can find out which organism evolved earlier, and from common ancestors, based on common features.
Organisms are classified on the basis of similarities and differences amongst them. Thus, organisms with similar features are grouped together. if another organism shows all features of a particular group and some modifications over it, than it is said to more evolved. So one can say that in a partiRead more
Organisms are classified on the basis of similarities and differences amongst them. Thus, organisms with similar features are grouped together. if another organism shows all features of a particular group and some modifications over it, than it is said to more evolved. So one can say that in a particular group the organisms would have co-evolved. this shows that evolution and classification are interlinked.
On the basis of population study whichever trait is more prevalent is the dominant one. In this case, the study says that light eye coloured children have light eyed parents. this clearly shows that is recessive trait so that both parents give the recessive gene for the child also to be homozygous rRead more
On the basis of population study whichever trait is more prevalent is the dominant one. In this case, the study says that light eye coloured children have light eyed parents. this clearly shows that is recessive trait so that both parents give the recessive gene for the child also to be homozygous recessive.
Explain how sexual reproduction gives rise to more viable variations than asexual reproduction. How does this affect the evolution of those organisms that reproduce sexually?
Variations arise either because of errors in DNA copying, during asexual reproduction, which will be fewer; or because of fusion of gametes from two individuals in sexual reproduction. Since, in sexual reproduction, gametes from two different individuals with different genetic make up, are involvedRead more
Variations arise either because of errors in DNA copying, during asexual reproduction, which will be fewer; or because of fusion of gametes from two individuals in sexual reproduction. Since, in sexual reproduction, gametes from two different individuals with different genetic make up, are involved so variations are much higher.
See lessWhat evidence do we have for the origin of life from inanimate matter?
this was given by fool-proof experiment by Urey and miller 1953. They simulated the conditions present on primitive earth, in a flask. This contained reducing gases like methane, hydrogen sulphide, hydrogen, carbon etc. The temperature, just below 100 degree c was maintained and current was passed.Read more
this was given by fool-proof experiment by Urey and miller 1953. They simulated the conditions present on primitive earth, in a flask. This contained reducing gases like methane, hydrogen sulphide, hydrogen, carbon etc. The temperature, just below 100 degree c was maintained and current was passed. At the end of a week, it was found that simple biomolecules were formed that included amino acids. This proved that in this manner, biomolecules would have come together and life originated.
See lessExplain the importance of fossils in deciding evolutionary relationships.
Study of fossils helps us to know as to how character/features have evolved in different groups of organisms. We also can find out which organism evolved earlier, and from common ancestors, based on common features.
Study of fossils helps us to know as to how character/features have evolved in different groups of organisms. We also can find out which organism evolved earlier, and from common ancestors, based on common features.
See lessHow are the areas of study – evolution and classification – interlinked?
Organisms are classified on the basis of similarities and differences amongst them. Thus, organisms with similar features are grouped together. if another organism shows all features of a particular group and some modifications over it, than it is said to more evolved. So one can say that in a partiRead more
Organisms are classified on the basis of similarities and differences amongst them. Thus, organisms with similar features are grouped together. if another organism shows all features of a particular group and some modifications over it, than it is said to more evolved. So one can say that in a particular group the organisms would have co-evolved. this shows that evolution and classification are interlinked.
See lessA study found that children with light-coloured eyes are likely to have parents with light-coloured eyes. On this basis, can we say anything about whether the light eye colour trait is dominant or recessive? Why or why not?
On the basis of population study whichever trait is more prevalent is the dominant one. In this case, the study says that light eye coloured children have light eyed parents. this clearly shows that is recessive trait so that both parents give the recessive gene for the child also to be homozygous rRead more
On the basis of population study whichever trait is more prevalent is the dominant one. In this case, the study says that light eye coloured children have light eyed parents. this clearly shows that is recessive trait so that both parents give the recessive gene for the child also to be homozygous recessive.
See less