Which best describes cancer cells?
they grow as a single layer.
they cease to reproduce after 20-50 mitotic division.
they reproduce only when needed to replace missing cells.
or they are not regulated by contact inhibition

Ans.

Cancer cells cab be defined as immortal cells that can divide continuously, form solid tumors. Cancer cells show following properties, which are represented by a normal cell:

-They divide continuously and indefinitely.

-These cells are self-sufficient, means they can grow and divide in absence or presence of growth factors or nutrients.

-They can evade apoptosis (programmed cell death) and become immortal.

-They grow in density-independent manner and do not show contact-inhibition that leads to their growth in multiple layers.

Thus, the correct answer is option). ' they are not regulated by contact inhibition.'

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.