Topic 2 - Growth And Differentiation Flashcards
1
Q
What is growth?
A
an increase in size as a result of an increase in the number of cells
2
Q
What are the two stages of growth in animals?
A
Cell division - mitosis
Cell differentiation - when an unspecialised cell becomes specialised
3
Q
What are the three stages of growth in plants?
A
- cell division (an increase in cells)
- cell elongation (each cell gets longer)
- cell differentiation ( an unspecialised cell becomes specialised)
4
Q
What is cell differentiation?
A
Occurs as organisms develop and the cell changes to become specialised. As the cell differentiates it forms new sub cellular structures eg. Tail on a sperm cell or the hairs on a root cell
5
Q
when do animal and plant cells differentiate
A
Animal - early stages of development
Plant - throughout their life cycle
