| A | B |
|---|
| A group of populations of different species living close enough to interact is called a biological ________. | community p. 1194 |
| A symbiotic relationship between two species in which one benefits at the expense of the other is called ____. | parasitism p. 1198 |
| A symbiotic relationship between two species in which one benefits while the other neither benefits nor is harmed is called ____. | commensalism p. 1199 |
| A symbiotic relationship between two species in which both benefit is called ___. | mutualism p. 1199 |
| Mutualism, parasitism and commensalism are all types of ____ relationships. | symbiotic p. 1198 |
| The sum total of a species' use of the biotic and abiotic resources in its environment is called the species' _____. | ecological niche p. 1195 |
| "Habitat" is to "address" as "niche" is to ____. | profession p. 1195 |
| Two species cannot coexist in a community if their ____ are identical. | niches p. 1195 |
| _____ is an interspecific interaction in which one species kills and eats the other species. | Predation p. 1197 |
| The organism from which a parasite derives its nourishment is called the ____. | host p. 1198 |
| A disease-causing agent is called a(n) ____. | pathogen p. 1213 |
| What are the two components of species diversity? | species richness and relative abundance p. 1200 |
Which forest below demonstrates the greatest diversity?,  | Forest A (Although both forests have the same species richness, the relative abundance in forest A is more balanced, giving it an overall higher rate of diversity) p. 1201, |
| Which forest below demonstrates the greatest species richness?, | They are both equal because both forests have 4 different species of plants p. 1200, |
The picture below represents a(n) ____.,  | food chain p. 1202, |
The picture below represents a(n) ____.,  | food web p. 1202, |
| The first (or bottom) level of a food chain is made up of the ____. | primary producers (a.k.a. - autotrophs) p. 1202,  |
| The second level of a food chain is made up of the ____. | primary consumers p. 1202, |
| Most food chains consist of no more than ____ trophic levels. | five p. 1203 |
| A _____ species is a species whose removal would cause a large effect on community structure. | keystone species (keystone species are usually low in abundance but play a pivotal ecological role in the community) p. 1204 |
| _____ species are species, generally introduced into a community by humans, that often times out-compete native species because they lack their own native predators and diseases in their new habitat. | Invasive species p. 1202 |
| The total mass of a population is called the population's _____. | biomass (total dry mass = normal mass minus water mass) p. 1203 |
| The orderly and predictable appearance and replacement of species as a community grows back after a disturbance is called _______. | ecological succession p. 1208,  |
The type of succession taking place in the picture below is _______.,  | primary succession (You are starting from scratch in this type of succession because you don't even have organic soil for life to colonize. Another example where primary succession would have to occur would be after a glacier retreats, leaving just rubble) p. 1208, |
The type of succession taking place in the picture below is _______.,  | secondary succession (After a forest fire, there is still very rich organic soil and probably some trees and seeds that survived. Another example where secondary succession occurs is on abandoned farmland) p. 1208, |
| The dry weight of organic matter comprising a group of organisms in a particular habitat. | biomass p. 1203 |
| A type of succession that occurs where an existing community has been cleared by some disturbance that leaves the soil intact. | secondary succession |
| The number of species in a biological community. | species richness p. 1200 |
| The elaborate, interconnected feeding relationships in an ecosystem. | food web p. 1202 |
| The number AND relative abundance of species in a biological community. | species diversity p. 1200 |
| A type of ecological succession that occurs in a virtually lifeless area, where there were originally no organisms and where soil has not yet formed. | primary succession p. 1208 |
| A species that is not necessarily abundant in a community yet exerts strong control on community structure by the nature of its ecological role or niche. | keystone species p. 1204 |
| A relationship in which two or more different species live in direct and intimate contact with each other is called _____. | symbiosis p. 1198 |
