B2.2 - Growth and Differentiation Flashcards
1
Q
In the development of animals, what are their cells like
A
- undifferentiated
- embryonic cells
- aka stem cells
2
Q
Mitosis in animal cells
A
- only can form the same cell again
3
Q
Cells that cannot divide are:
A
- red blood cells
- skin cells
- nerve cells
4
Q
What happens to cells that cannot divide
A
-they rely on adult stem cells
5
Q
Nerve cells cannot divide so
A
they stay permanently damaged
-causes paralysis
6
Q
Plant cells and differentiation
A
- they can specialise throughout their life
- undifferentiated cells from at active regions
7
Q
Meristems
A
- active regions where unspecialised cells are found
- found in the roots/stems
8
Q
What happens to plant cells before the differentiate
A
They elongate and grow
9
Q
Meristems and unspeciailsed cells
A
- cells produced by meristems
- only specialise after they have reached their final position in the plant
- E.g then they can form phloem cells
- even then it isn’t permanent
- plant cells can be moved to another plan and redifferentiate
10
Q
Cloning Plants
A
- produced by taking a tiny piece of leaf tissue
- it will become unspecialised under the right conditions
- it’ll undergo mitosis
- finally specialising to form a cell
11
Q
cloning meaning
A
the production of identical offspring by asexual reproduction
