Passive transport is the movement of substances across a cell membrane without the use of

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Passive transport is a movement of ions and other atomic or molecular substances across cell membranes without need of energy input. Unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

Progression

Explanation:

Carcinogenesis can be defined as the formation of cancerous cell in the body. The normal cells of the body gets converted into oncogenes.

Carcinogenesis can be caused due to any of the following factors. These factors are physical, biological and genetic factors.

The stages of carcinogenesis are initiation, promotion and progression. In the stage of progression is irreversible karyotipic instability and growth of malignant tumor.