What is DNA copying? State its importance.
The process of production of a new DNA molecule from an already existing DNA molecule through chemical reactions is known as DNA copying. It is accompanied by the creation of new cellular apparatus so that the daughter DNA and parent DNA can be separated.
Importance of DNA copying:
1. It helps in the transmission of characteristics from parents to offspring.
2. It helps in the maintenance of the chromosomal number in the new cell.
(i) Planaria, insects, octopus and vertebrates all have eyes. Can we group eyes of these animals together to establish a common evolutionary origin? Justify your answer.
(ii) Birds have evolved from reptiles. State evidence to prove the statement.
If you focus the image of a distant object, whose shape is given
below, on a screen using a convex lens,
the shape of the image of this object on the screen would be:
Give the respective scientific terms used for studying:
(i) The mechanism by which variations are created and inherited and
(ii) The development of new type of organisms from the existing ones.
