Learning Biology
Contains various MC exercises and explaination of misconceptions in Biology
http://www.fed.cuhk.edu.hk/~johnson
Reference materials for A Level Biology

http://www.biologymad.com/

Online Biology book
http://www.estrellamountain.edu/faculty/farabee/biobk/biobooktoc.html
Chinese translation of the biological terms
http://www.cmi.hku.hk/Ref/Glossary/Bio/i.htm
 
The world under the microscopes
Slids from electronic microscopes
http://www.denniskunkel.com/
Cytology
http://www.cellsalive.com/
 
Biodiversity
Introduction of local wild life
Infromation of butterflies in Hong Kong
http://www.hkls.org/
Infromation of birds in Hong Kong
http://www.hkbws.org.hk
 
Introduction of local flora
http://www.leafvein.net/index.htm
http://www.hkflora.com/
http://www.hkherbarium.net/Herbarium/index.html
http://www.hktree.com/
http://resources.edb.gov.hk/~trees2/
 
Conservation
World Wide Fund for Nature (Hong Kong)
http://www.wwf.org.hk
Agricultural, Fisheries and Conservation Department
http://www.afcd.gov.hk
Environmental Protection Department
http://www.epd.gov.hk/epd/
 
The digestive system
Dissection of frog
http://www.froguts.com/flash_content/index.html
 

Detecting environmental conditions

Ox eye's dissection

http://www.exploratorium.edu/learning_studio/cow_eye/index.html
 
Reproduction
Mitosis
http://www.biology.arizona.edu/Cell_bio/tutorials/cell_cycle/cells3.html
Meiosis
http://www.biology.arizona.edu/cell_bio/tutorials/meiosis/page3.html
Seed dispersal of plants
http://naturet.ngo.org.tw/study/seed_story/seedindex.htm
 
Biotechnology
Genetic science learning
http://learn.genetics.utah.edu/index.html