A carbohydrate polymer composed of beta-glucose subunits is called

Glycogen. The principal storage polysaccharide in animal cells; formed from glucose and stored primarily in the liver and , to a lesser extent, in muscle cells.

Explanation:

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both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.