“Evolution and classification or organisms are interlinked”. Give reasons to justify this statement.

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 relationship

A chain of yeast cells forms because

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.

Give reasons why acquired characters are not inherited.

Differentiate between inherited and acquired characters. Give one example for each type.

Evolution has exhibited a greater stability of molecular structure when compared with morphological structures. Comment on the statement and justify your opinion.

Mention three important features of fossils which help in the study of evolution.

Does the occurrence of diversity of animals on earth suggest their diverse ancestry also? Discuss this point in the light of evolution.

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 that