Which of these cell junctions form a barrier to the passage of materials?

desmosomes (anchoring junctions)
tight junctions
keratin fibers
plasmodesmata
gap (communicating) junctions

the supermassive black hole is in the middle of the galaxy.

starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.

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