Identify the correct statement about green algae.
1
Green algae usually have a soft cell wall made of an inner layer of pectose.
2
Green algae usually have a rigid cell wall made of an inner layer of protein and an outer layer of fibre.
3
Green algae usually have a rigid cell wall made of an inner layer of cellulose and an outer layer of pectose.
4
Green algae usually have a rigid cell wall made of an inner layer of fat and an outer layer of protein.