4.2 Assessment

What is the difference between a habitat and a niche?

A habitat is the general place where an organism lives and a niche is the range of physical and biological conditions in which a species lives and the way the species obtain what it needs to survive and reproduce.

What is a keystone species?

A keystone species is single species that is not usually abundant in a community yet exerts strong control on the structure of a community.

How is a niche like a profession?

A niche is similar to a profession as it is your role in the world.

What is the difference between a predator and a parasite?

A predator is an organism that preys upon other organism while a parasite is an organism that obtains nourishment and shelter on another organism.

What is competition? Why can't two organisms compete if they live in different habitats?

A symbiotic relationship between or among living things for resources, such as food, space, shelter, mate, ecological status, etc. According to the competititive exclusion principle, if two species attempt to occupy the same niche, one species will be better at competing for limited resources and will eventually exclude the other.

Herbivory is defined as

A.) the interaction in which one animal feeds on producers

The full range of physical and biological conditions in which an organism lives and the way it interacts with those conditions is called

A.) the organism's niche

The three main classes of symbiotic relationships in nature include

B.) mutualism, parasitism, and commensalism

what are three primary ways that organisms depend on each other ?

Biologists recognize three main classes of symbiotic relationships in nature: mutualism, parasitism, and communalism. 

how does competition shape communities?

By causing species to divide resources, competition helps determine the number and kinds of species in a community and the niche each species occupies. 

A species tolerance for environmental conditions helps determine its

C.) habitat

A relationship between organisms in which one species benefits and the other is not affected is called

D.) commensalism

What is symbiosis?

Symbiosis is the relationship in which two species live close together. The three types of symbiosis are mutualism, parasitism, and commensalism.

Bacteria living in a cow's stomach help the cow break down the cellulose in grass, gaining nutrients in the process. Is this an example of commensalism or mutualism? Explain your answer.

mutualism because they both have a mutuallistic agreement they both get what they wanf

what is niche ?

niche is the range of physical and biological conditions in which a species lives and the way the species obtains what it needs to survive and reproduce.

How do predation and herbivory shape communities?

predators can affect the size of pret populations in a community and determine the places prey can live and feed.

Look at the figure below and describe how the three species of warblers have divided their resources. Does each warbler have its own niche?

yes it does