(See related pages)
|
|
|
| Read each sentence and identify the word/phrase that you believe correctly completes the statement. Then, click on the arrow to see if your answer is correct. 1. is the study of how organisms interact with each other and with their environment. 2. The requirements that organisms need to survive and reproduce, such as food, water and space, are called . A is one whose short supply prevents the growth of a population. 3. is what happens when a resource is in short supply. 4. occurs when a superior competitor eliminates another species from the community. 5. The of a species is its precise role in the community: its diet, habitat, and other aspects of its lifestyle. 6. occurs when organisms eat other organisms. Carnivores are animals that eat , herbivores are organisms that eat . 7. In an , the effects of one species on another go on to affect a third species. 8. is the living together of different organisms. In , one organism benefits without harming the host. In parasitism, the symbiont harms the . In , both partners benefit. 9. From the point of view of food, or relationships, a community can be divided into , which make food by photosynthesis, and , which eat the food produced by primary producers. Energy and materials flow from one level to another up the (or ). 10. (or ) may result from leakage out of cells or excretion as waste. 11. Microorganisms that break down non-living organic matter are called . Non-living organic matter from the action of these microorganisms, together with dead organic matter in solid form, makes up . 12. is the transformation of nitrogen gas into a form that organisms can use. 13. Organisms that live on the bottom are called . Pelagic organisms live in . are organisms that drift in the currents, and nekton are organisms that can swim the currents. |