Two pink coloured flowers on crossing resulted in $1$ red,$2$ pink and $1$ white flower progeny. The nature of the cross will be

$A$ woman having blood group $B$ marries a man having blood group $A$ and they have four offspring. Two children have blood group $O$,one has blood group $B$,and one has blood group $AB$. Now,answer the following:
$(i)$ Which blood group is dominant?
$(ii)$ Which blood group is recessive?
$(iii)$ What are the genotypes of the parents?
$(iv)$ Show the possible genotypes and phenotypes of the offspring.

Homologous organs are different from analogous organs. Mention the two basic characteristics that decide about analogy and homology between the two organs.

Which type of animals were the Dinosaurs having feathers?

According to the evolutionary theory,the formation of a new species is generally due to:

What is the process of transmission of characters from parents to offspring called?