The main difference between starch and cellulose is that:
plants make cellulose and animals make starch.
the residues are connected differently in starch and cellulose.
cellulose contains glucose and starch contains fructose.
cellulose is a polysaccharide and starch is a monosaccharide.

the residues are connected differently in starch and cellulose.

Explanation:

Starch is formed from alpha glucose, while cellulose is made of beta glucose. The difference in the linkages lends to differences in 3-D structure and function. Starch can be straight or branched and is used as energy storage for plants because it can form compact structures and is easily broken down.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.