Lesson 4 - Growth and Repair Flashcards
(7 cards)
1
Q
meaning dry mass
A
the mass of the body of an organism with all the water removed from it
2
Q
meaning meristem
A
the region of mitosis and growth in a plant shoot or root
3
Q
meaning growth
A
the permanent increase in cell number, size and mass
4
Q
what are the 3 aspects of growth
A
- cell division
- assimilation
- cell expansion
5
Q
what do growth curves show
A
the growth throughout the life of an organism
6
Q
in animals, why does growth stop with maturity
A
the size is limited by the weight of the animal and the ability of its muscles to move against gravity
7
Q
when does the repair of body cells stop
A
when mitosis occurs less frequently and the cells dying begin to outnumber the new cells being formed
