Sagot :
HERE ARE THE ANSWER
The first line of defense occurs when plant cells detect the presence of some sort of foreign invader (by detecting general characteristics such as the flagella of bacteria or the chitin found in fungi cell walls) and alert surrounding cells by releasing certain molecules that tell other cells to amp up their defenses. For example, alerted plant cells may secrete molecules that are harmful to invadors or build up their cell walls for extra protection.
The first line of defense occurs when plant cells detect the presence of some sort of foreign invader (by detecting general characteristics such as the flagella of bacteria or the chitin found in fungi cell walls) and alert surrounding cells by releasing certain molecules that tell other cells to amp up their defenses. For example, alerted plant cells may secrete molecules that are harmful to invadors or build up their cell walls for extra protection.
plant cells are not able to move, so every single cell must be able to defend itself against attack from invading pathogens like fungi and bacteria :)