Well Sertoli cells<span> keep the germ </span>cells<span> that start the process healthy and nourished. </span>
A It’s very simple I have gone over this
<span>The plasma membrane is phospholipid bilayer. The layers are two and are continuous flat sheets. They have proteins and cholesterol embedded in them, for facilitating the transport of compounds and maintanng fluidity. The lipid bilayer is both hydrophobic and hydrophillic. </span>
Because they take up both parts of traits so that makes it group to similar organisms
Hi!
I would say C, weak, dead, or partial antigens because do you need to be introduced to the disease for your body to fight it.
Hope this helps!
