Answer:
AS we know that the composition of plasma membrane is solely composed of phospholipids and protein molecules. lipid bilayer made up of phospholipid acts as differential permeable membrane because it allow only the transport of non polar molecules. however, there are some proteins known as carrier proteins that help in the transport of polar molecules through facilitated diffusion.
The correct answer is postural muscles.
Postural muscles are muscles with the function to sustain posture in the gravity field. In response to stimuli such as over-use, under-use or trauma, postural muscles tend to shorten. This type of muscles is sometimes called tonic muscles because they have high resting tonus.
las plantas crean oxígeno que hace funcionar a todos los organismos vivos. que establece que si no creamos dióxido carbono, ellos sufrirán.