FULL EMPTY
Keeps the plant upright, and help seedlings break open.
VACUOLE
VACUOLE
Converts glucose into chemical energy.
2.
The diagram shows the vacuole organelle found in plant cells when it is full and when
it is empty. This determines the amount of turgor pressure a plant experiences. What
is the purpose of turgor pressure in plants? Turgor pressure-
O
Directs root growth in the direction of gravity.
Keeps the plant wilted to promote photosynthesis.

Match your vocabulary word to its definition. 1. emigration 2. immigration 3. migration 4. overpopulation 5. sustainable development 6. under population 7. unsustainable development 8. urbanization the movement from one place to another the number of people exceeds the available natural resources in an area leaving one's homeland to settle in a new place the increase in the population of a city the movement of people to a new country the ability to meet current needs without reducing the ability to meet future needs resources being used up at a faster rate than they can be replenished birth rate insufficient to replace the existing population