Populations, Communities, and Biodiversity Powerpoint Questions
12. The limit to population size that a particular environment can support is
called ________________________(k).
1. Define Population Density.
13. What will eventually happen to the human population as it grows?
2. Define Spatial Distribution and state the 3 main types of dispersion.
14. Our growth rate will start to look like most organisms, which is the
__________ Growth Model.
3. The primary cause of dispersion is ___________________________.
15. State 3 facts about the Logistics Growth Model.
4. The population growth rate depends on how fast a given population ________.
5. State the 4 factors that influence population growth .
16. Populations will stop increasing when (state 2 conditions).
6. Density-independent factors are factors that limit
_______________________, regardless of population density, and these are
usually ______________ factors such as (state 6 examples.)
17. Can the carrying capacity be raised or lowered? If so, how (give two
examples)?
7. Define density-dependent factors.
18. Give two cycles to show when populations do not reach “k” as smoothly as
in the logistics graph.
8. Density-dependent factors are usually biotic factors such as (stat 4 examples).
9. The Exponential Growth Model is also called the _____________ growth or
__________ growth; its first growth phase is _________ and called the _______
phase and the second growth phase is _________ and called the _____________
growth phase.
10. What is Population Density?
11. _____________ follows as nutrients and resources are used up.
19. State 5 descriptions about species that follow the Boom-and-Bust Life
Cycle.
20. Draw the graph to represents the population growth of species that have
longer life spans, produce few offspring, and are larger organisms.
28. During Primary Succession, small _________ plants and other organisms
are established, and as these organisms die, additional ________ is created.
29. __________ brought in by animals, water and wind begin to grow in the
soil. Eventually enough soil is present for ___________ and ____________ to
grow.
30. The stable, mature community that eventually develops from bare rock is
called a __________________________________.
31. What are some disturbances that can disrupt a community?
21. A ________________ is a group of interacting populations that occupy the
same area at the same time.
32. After a disturbance, new ___________ of plants and animals might occupy
the habitat.
22. Describe what are limiting factors to communities?
33. Pioneer species in secondary succession are usually _________ that begin to
grow in the disturbed area; this is much ___________ than primary succession.
34. Why can’t we predict the end point of an ecological succession?
23. The Range of Tolerance is the _________ within which an organism can
exist.
24. ____________ _______________ is the change in any ecosystem that
happens when one community replaces another as a result of changing biotic and
abiotic factors.
25. State the two types of ecological succession.
26. Describe Primary Succession.
27. The first organisms to arrive in Primary Sucession are usually __________
or __________, which are called pioneer species. They secrete _________ that
can break down rock and their dead, decaying organic materials, along with bits
of sediment from the rock make up ________.
35. Define Biodiversity and state the 2 main types.
36. The gradual process of becoming extinct is known as ____________
extinction. _______________________ occurs when a large percentage of all
living species become extinct in a relatively short period of time.
37. State the 5 most recent mass extinctions.