Facilitated diffusion
<span>The word 'diffusion' means free movement across distance, with or without the presence of a barrier. However, there is a phenomenon known as facilitated diffusion which occurs at the cellular level. The cell does not allow free radicals and other harmful substances to enter and harm the cell organs. This is possible due to the structure of the cell membrane. The structure is such that, it allows only certain things to pass in and out of the cell. One such activity that allows selective movement in and out of the cell is the process of facilitated diffusion.</span>
Answer: Helps the plant breathe: The epidermis of the leaf contains guard cells that control and regulate the small pores on the undersurface of the leaves. These pores are called stomata. Stomata are responsible for regulating water in and out of the cell. It is also responsible for the exchange of gases across the epidermis.
La síntesis de proteínas se realiza en los ribosomas situados en el citoplasma celular. En el proceso de síntesis, los aminoácidos son transportados por ARN de transferencia correspondiente para cada aminoácido hasta el ARN mensajero donde se unen en la posición adecuada para formar las nuevas proteínas.
Hey! your answer is --
Amoeba and Paramecium both are unicellular organisms . t
both take any plan and animal as food which float in water . the mode of nutrition in Amoeba is hetrotropic .
The process of taking food is called phagocytosis ..
Step--
Amoeba get food in pseudopodia and in closed in a food vacuole and digest them to get energy . The digested part of the food diffuse into cell cytoplasm and undigested part of food expell at any point on body surface ..
★ hope u understand ★
