Large polysaccharides generally have one of two functions: as a very strong structural component of a cell and as a storage molecule for readily accessible energy. there are also two primary energy-storage polysaccharides. what are they?
a) starch, which is synthesized by plants, and glycogen, which is synthesized by animals.
b) glucose, which is synthesized by plants, and glycogen, which is synthesized by animals.
c) cellulose, which is synthesized by plants, and glycogen, which is synthesized by animals.
d) starch, which is synthesized by plants, and phospholipids, which are synthesized by animals.

A) Starch, which is synthesized by plants, and glycogen, which is synthesized by animals.

Both compounds are carbohydrate polymers, but are composed of different compounds. Starch is actually a mixture of two slightly different polysaccharides while glycogen is essentially amylopectin. (explanation from USATestprep)

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oxygen is the first element in group 16 (via) of the periodic table. the periodic table is a chart that shows how chemical elements are related to each other. the elements in group 16 are said to belong to the chalcogen family. other elements in this group include  sulfur, selenium, tellurium,  and  polonium.  the name chalcogen comes from the greek word  chalkos,  meaning "ore." the first two members of the family, oxygen and sulfur, are found in most ores.

oxygen is by far the most abundant element in the earth's crust. nearly half of all the atoms in the earth are oxygen atoms. oxygen also makes up about one-fifth of the earth's atmosphere. nearly 90 percent of the weight of the oceans is due to oxygen. in addition, oxygen is thought to be the third most abundant element in the universe and in the solar system.