Substances known as 'heredity carriers' are
Ribosomes
Genes
Enzymes
Hormones
Who discovered "Reverse transcription''
Episome is a
Assertion: Polytene chromosomes have a high amount of $DNA$.
Reason: Polytene chromosomes are formed by repeated replication.
Sometimes cattle or even human beings give birth to their young ones that are having extremely different sets of organs like limbs/position of eye(s) etc. Comment.