Biology · PLANT KINGDOM

Green algae possess a rigid cell wall with a characteristic dual-layer chemical composition. What are the inner and outer layers made of respectively?

1. A
   Inner pectose and outer cellulose.
2. B
   Inner pectin and outer polysulphate esters.
3. C
   Inner algin and outer chitin.
4. D
   Inner cellulose and outer pectose.