It is important to survival that both unicellular and multicellular organisms are able to maintain homeostasis. Which is not example of how organisms maintain homeostasis?

a. Cells always stay the same.
b. Cell division allows organisms to grow and repair damaged parts.
c. Food is made during photosynthesis, and energy is produced from food during respiration.
d. Materials move into and out of cells through the cell membrane.

Average annual precipitation and are the two major features that define the biomes on earth.

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area