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1. _____ is the number of organisms within the same species that inhabit a specific area. Population density Exponential growth
Population dispersion A limiting factor
2. What is a community? a group of different species that inhabit the same environment a group of organisms that are of the same species and share a habitat
the species, abiotic factors, and biotic factors that inhabit the same environment the abiotic factors of a habitat
3. When one organism hunts another organism, what type of relationship exists? symbiotic predation
mutualism commensalism
4. _____ are organisms moved from their native environment to a new, nonnative habitat. Niches Parasites
Introduced species Communities
5. Even, random, and clumped all describe types of _____? exponential growth population density
population dispersion limiting factors
6. Which of the following is NOT an example of a limiting factor? habitat space availability of food
outbreak of disease migration
7. What causes interspecies competition within a community? when two or more species compete for resources when a single species dominates the food supply
when two species have different dietary requirements when a single species requires a variety of food sources
8. If there has been a competitive exclusion within a community, what has occurred? A species that had previously competed for food has been eliminated from the community by a more efficient species. Limiting factors have decreased competition within the community.
The carrying capacity of the habitat has been reached. Two species that previously competed for food have begun to share the resources equally.
9. In which of the following relationships do both of the organisms involved benefit from one another? predation mutualism
commensalism parasitism
10. Which of the following factors influence the global distribution of ecosystems?
I. atmospheric circulation
II. oceanic circulation
III. land formations
IV. local environmental conditions
I and II I and III
I, II, and IV I, II, III, and IV
11. Before the 20th century, the growth of the human population was relatively _____. rapid slow
unstable exponential
12. No two species in a single community occupy the same _____. population ecosystem
niche habitat

The dissapearance of a population in a given niche as a result of direct competiton with another species for a resource is called….
A. Competitive exclusion
B. Predation
C. Parasitism
D. Commensalism
-thanks for the help!!

Question 6
The many amazing chemicals produced by plants and animals, that humans have found uses for as medicines, were produced by these organisms as _____.
for no good reason that anyone can find
helpful aids to human health
defenses against competitors or predators
Question 7
When a food supply is subdivided to create two different realized niches, this is an example of _____.
symbiosis
competitive exclusion
a density-independent effect
resource partitioning
8
Competition is _____.
good for both the winner and loser
deterimental to both species involved
bad for the loser but good for the winner
Question 9
Which relationship is sometimes considered a special type of predation where the predator typically does not kill its victim?
competition
commensalism
parasitism
mutualism
Question 10
When an organism kills another organism in order to gain a food supply, the organism doing the eating is called a _____.
host
predator
parasite
prey
Question 11
When predators are removed from an ecosystem, what is the typical result?
biodiversity in prey species increases
there is no significant change
biodiversity in prey species decreases
Question 12
A predictable and orderly change in an ecosystem, where one community is replaced by another that is more complex, is called _____.
succession
commensalism
competitive exclusion
endosymbiosis
Question 13
Some ants are “aphid ranchers”. The ants feed on the aphid’s sugary excretions, and the ants will carry the aphids to new plants so that the aphids always have a food supply. This is an example of a _____.
commensalism
predation
parasitism
mutualism

The fundamental niche of a species includes the total range of environmental conditions that are suitable for existence without the influence of interspecific competition or predation from other species. The realized niche describes that part of the fundamental niche actually occupied by the species.
Diagram in link.

i forgot my biology book at school and i need help with these questions. any answer helps, i prefer complete sentence if you are willing, but if not, thanks anyway. so here are the questions.
1 What is ecology?
2 define: species; population; community; ecosystem; biome; biosphere;
Tell how these are related.
3 How is a habitat different from a niche;
4 What are biotic and abiotic factors?
5 What is the Competitive Exclusion Principle?
6 How is the movement of matter AND energy through an ecosystem different?
7 What are autotrophs? Give examples. What are heterotrophs? Give examples.
8 Name two ways autotrophic organisms can make their own food. How are these different?
9 What is a resource? A food chain? A food web? How are these related?
10 What is an herbivore, carnivore, omnivore, detritivore, decomposer,scavenger?
11 How do they get their energy? Be able to give examples of each of these.
12 What is a trophic level? What percentage of energy is passed on from one trophic level to the next?
13 What is a biogeochemical cycle?.
14 How do (water, carbon, nitrogen, phosphorus) atoms enter and leave the atmosphere, land, water, and cycle through the ecosystem?
15 In which cycle does the atmosphere NOT play a role?
16 Which biomolecules are important to living things and which cycles provide the atoms to build these?
17 What is transpiration? Nitrogen fixation? Denitrification? Evaporation? Condensation? Precipitation?
18 Which organisms play a role in these processes?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~…
19 NAME the 6 levels or organization that ecologists use
20 What are the ways organisms interact in an ecosystem? Define:(Competition, Predation, Symbiosis)
21 Name the 3 kinds of symbiosis? Identify examples of each?
21 What are some things organisms must compete for?
22 What is a limiting factor? How does it affect a population?
23 What is primary productivity? An algal bloom?
24 What happens when an over abundance of a limiting factor becomes available?
25 How do organisms cooperate? What is predation? What is a predator? Prey?
26 What are the 3 kinds of symbiosis? Be able to identify examples of each?
27. Name the two things that can affect the size of a population
28. What is exponential growth? Under what conditions does it occur in a population?
29. What is logistic growth?
30. Give two examples of density-dependent limiting factors? What does this type of limiting factor
rely on?
31. What is the difference between primary and secondary succession?
32. What kind of growth is represented by a S curve (as opposed to a J curve)
33. Explain the difference between a resource that is renewable and nonrenewable.
you do not have to answer all of them (you’d be AWSOME if you did though(: ) but try to answer one that hasnt been answered yet. THANK YOU!(:

1.Commensalism involves…
A.Abiotic factors B.Biotic factors
2.Competition
A.Abiotic factors B.Biotic factors
3.Habitat
A.Abiotic factors B.Biotic factors
4.Mutualism
A.Abiotic factors B.Biotic factors
5.Niche
A.Abiotic factors B.Biotic factors
6.Predation
A.Abiotic factors B.Biotic factors