What substance would have the slowest speed of passage across a selectively permeable membrane?

Large polar molecules

Cell membrane or plasma membrane is a semi permeable membrane. it is made of lipid bilayer. Only lipid soluble molecules and small molecules can pass through it. Ions and large polar molecules cannot pass through it. Non-polar molecules are highly permeable whereas, polar molecules are low permeable.

which are post-impressionist paintings? check all that apply?

explanation:

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and color.

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unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.