Evolution has exhibited a greater stability of molecular structure when compared with morphological structures. Comment on the statement and justify your opinion.
Molecular structure is the smallest component with which an organism is made up of while the morphological structure is the external structure of an organism which can be seen by us. The diversity, in organisms, that we see around is because of diversity in morphological structure. When we look at the molecular level all the organisms are made up of same biomolecules. DNA, protein, lipid, carbohydrates, etc. The DNA structure is same in all organisms but the count of DNA may vary. Irrespective of the type of organism, a DNA molecule or a protein molecule would have the same structure. Hence, it can be said that molecular structures show great stability.
Rate this question :
A student weighed some raisins and recorded the weight as 'x'. She then soaked the raisins in distilled water. After about 2 hours she removed the raisins, wiped them dry and weighed again and recorded that as 'y'. The percentage of water absorbed by raisins may be determined using the relationshipScience - Board Papers
A chain of yeast cells forms becauseScience - Board Papers
Bacteria have a simpler body plan when compared with human beings. Does it mean that human beings are more evolved than bacteria? Provide a suitable explanation.NCERT - Science Exemplar
Give reasons why acquired characters are not inherited.NCERT - Science Exemplar
Differentiate between inherited and acquired characters. Give one example for each type.NCERT - Science Exemplar
Evolution has exhibited a greater stability of molecular structure when compared with morphological structures. Comment on the statement and justify your opinion.NCERT - Science Exemplar
What are homologous structures? Give an example. Is it necessary that homologous structures always have a common ancestor?
Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means thatNCERT - Science Exemplar
Select the correct statementNCERT - Science Exemplar
If the fossil of an organism is found in the deeper layers of earth, then we can predict thatNCERT - Science Exemplar