Tuesday, November 11, 2008

The wind blow the three... ask them... which leave be the next.


Tuesday, November 4, 2008

PLANT TISSUES

DIVIDE INTO TWO:
A) meristematic tissues (immature cells)
b) permanent tissues (mature cells)


A) is actively dividing cells through mitosis, cells are small, thin-walled, with no central vocuole and no specialized features. three regions of meristematic:
i) apical meristem
ii) lateral meristem
iii) intercalary meristem
b) divide into three:
i) ground tissue system - parenchyma, collenchyma, sclerenchyma
ii) dermal tissue system-periderm
iii) vascular tissue system-xylem and phloem

STUDY OF ECOLOGY...

INTEREST TOPIC..