2.4, 2.5, 2.6 Growth, differentiation and cancer Flashcards
1
Q
How does growth occur in animals?
A
- Cell division
- Differentiation
2
Q
How does cell division occur?
A
by mitosis
3
Q
How can specialised cells make more of the same cells ?
A
undergoing mitosis
4
Q
In mature animals, what does cell division (mostly) do?
A
Repair/ replace damaged cells (as they undergo little growth)
5
Q
How does growth occur in plants?
A
- Cell division
- Differentiation
- Elongation
6
Q
How can plants grow longer in specific directions?
A
by absorbing water into their vacuoles - controlled by substances called auxins
7
Q
When do plants differentiate?
A
when they reach their final position in the plant - but they can still redifferentiate when it is moved to another position
8
Q
How does cancer occur?
A
a result of small changes in cells, leading to uncontrolled cell division - group of cells that result from this are called a tumour
