Answer:
answer a is trash answer b add a vertical line
Explanation:
Answer:
Diamond is a solid form of the element carbon with its atoms arranged in a crystal structuctre. It is formed in the mantle and delivered to the surface by deep source volcanic eruption.
Explanation:
it have exquisite beauty, inner fire, and unique physical quantity have made them so precious.
Answer:
A) they help transport some substances through the membrane.
Explanation:
The membrane proteins that span the bilayer of phospholipids help in the transport of polar, large and charged substances across the membrane. The nonpolar core of the membrane does not allow these charged and polar substances to pass through. Proteins serving as channels form pores to allow movement of the specific substances.
On the other hand, carrier transport proteins of the membrane bind to the substances present at one side of the membrane and deliver them to the opposite side.
