Biology - B5

What are unicellular organisms?

What is a multicellular organism?
and in a multicellular organism name the things the cells form from smallest to largest ?

What is a zygote?

How do cells differentiate?
And give an of a specialised cell?

What is special about the 8 cell stage?

What are embryonic and adult stem cells?

Why are stem cells important? in terms of within the body and within medicine?

What are palisade cells where are they found and give two features?

What are xylem cells and give features?

What are phloem cells where are they found and give features?

What is a vascular bundle?

What are meristems, what is their purpose, how do they divide and where are they found?

Explain the process of tissue culture and the 4 stages?

Explain making clones from cuttings?

What are the advantages of using tissue culture over cuttings?

What is tissue culture with meristems and what are the advantages?

What are auxins?

What is phototropism and how does it work in plants?

What is mitosis? and give the stages

What is the 'cell cycle'?

What is meioses outline the stages and its importance?

Describe the structure of DNA?

Outline the genes and base pairs?

How are proteins made?

After the 8 cell stage what two things could happen to a cell?

What are ethical issues with stem cell research?

What is therapeutic cloning? and what are some ethical issues?

What can scientists now do in terms of active and inactive genes and what are the ethical issues?