Question

what are the phases of mitosis?
there are four phases of mitosis. these phases are prophase,
metaphase, anaphase, and telophase.
phases of mitosis | what happens
prophase (with an image of a cell) | - the duplicated chromosomes form into an
x shape and the nucleolus disappears.

• spindle fibres, which are tiny tube - like struc-

tures made of protein, begin to form in plant
and animal cells
metaphase (with an image of a cell) | - the duplicated chromosomes line up across
the middle of the cell
anaphase (with an image of a cell) | - the duplicated chromosomes move apart to
opposite ends of the cell
telophase (with an image of a cell) | - a nucleolus forms around the chromosomes at
the opposite ends of the dividing cell
how can mutagens affect the cell cycle?
mutagens can cause changes in the cell cycle so that cells keep
dividing continuously. the cells pile up on top of one another,
forming a lump called a tumour. the uncontrolled cell division
sometimes results in diseases called cancers. cancerous cells
may grow in one place in the body, or they may spread to other
parts of the body where they will continue to divide.
reading check

1. what is cancer the result

of?

Explanation:

The text explains that mutagens cause cells to divide continuously, leading to uncontrolled cell division. Cancer is the result of this uncontrolled cell division (due to mutagens affecting the cell cycle), forming tumors and spreading. So we extract the key point about cancer's cause from the provided text.

Answer:

Cancer is the result of uncontrolled cell division, which occurs when mutagens cause changes in the cell cycle that make cells keep dividing continuously.