Natural selection cannot occur without what

Hello.

There are a couple things needed for natural selection.

Natural selection is organisms become comfortable and changer where they are newly located. Where they can live and get more off springs.

First, You will need heredity  which passes traits to an offspring.

Second, reproduction that is needed to to copy traits and give them to the offspring.

i would say the prokaryotic cells the prokaryotic cells are less complex, are usually found only in unicellular organisms and have more limited capabilities than eukaryotic cells.

compost can be added to topsoil as a:

pesticide