Which statements regarding a cell membrane is true? Select one:

a.
It contains chemical markers.

b.
It is composed of one type of molecule.

c.
It protects the cell from being destroyed by bacteria.

d.
It is needed to break down materials before they enter the cell.

This is so important ugh its 25 points

Food webs - transferring energy and matter from one level to another. here you see four food webs. one or more are incorrect. which food web(s) show the correct sequence of organisms, from start to top level consumer? a) a b) d c) c d) a and d

Why is earth's outer core hotter than earth’s oceanic crust? earth’s oceanic crust is denser than earth’s outer core is. earth’s oceanic crust has lava flowing from the mantle. earth’s outer core has a composition of solid iron and nickel. earth’s outer core is deeper within earth than oceanic crust is.