) 1. The roots of a plant grow in the cracks of a sidewalk. As the root grows larger the cement begins to crack.

Physical Weathering

Explanation:

Mechanical breakdown of rocks

showing a photograph would make this a hell of alot easier

it's the cell cycle, but cytokines is when the cell divides.

theres 3 stages interphase,mitosis,and cytokines.

interphase prepares the cell for division.

mitosis is the process of dividing the cell,it has 4 parts interphase,anaphase,metaphase,and telophase.

lastly there's cytokines,that's when the cell divides into 2 daughter cells