Which natural polymer contains 3,000 or more glucose monomers?

Cellulose

Explanation:

Cellulose is a carbohydrate (made up of carbon and and hydrogen atoms). This is common component of cotton and wood. It is also a major component of plant cell walls Cellulose is a polymer that is composed of 3000 or more than 3000 glucose monomers linked together through β(1→4) D-linkage.

It is considered to be one of the most abundant polymers of organic nature on the earth.

It has a number of commercial uses like:Manufacturing of paper and paper based products.In scientific labs for conducting thin layer chromatography.Manufacture of textile for clothings.Manufacturing of biofuels and pharmaceuticals.

Hope it help

That is true! many fish species traveled to the u.s. because of it.

Amight be the answer