B2 Topic 3 Growth & Development Flashcards
0
Q
How can you measure growth in an organism
A
Size- measure height length width
Wet mass- we contain lots of water and our weight depends on water retention. This is our mass including water.
Dry mass- mass with no water in body. Only done when dead.
1
Q
What is growth
A
An increase in size or mass
2
Q
Plants and animals grow due to the following processes
A
Cell differentiation (cell becomes specialised) Cell division (mitosis) Cell elongation (plant cell expands-grow)
3
Q
What processes do animals grow by?
A
Cell division as we grow when young and stop when we become adult as cell division no longer for growth but repair. (cell differentiation also lost at young age)
4
Q
What process do plants grow by?
A
Cell elongation as plants grow continuously. They differentiate to form new parts and cell division happens in roots shoots only.
