'In plants & invertebrates, this outermost layer of protection is usually just one cell thick'
Epidermis
BIOLOGY: In plants & invertebrates, this outermost layer of protection is usually just one cell thick
In plants & invertebrates, this outermost layer of protection is usually just one cell thick
In plants & invertebrates, this outermost layer of protection is usually just one cell thick
BIOLOGY
Epidermis
BIOLOGY