biology unit 3-4

Question 1

carrying capacity

Answer 1

the maximum number of organisms an ecosystem can withstand for an extended period of time

Question 2

upper limit

Answer 2

birth rate drops and death rates increase

Question 3

lower limit

Answer 3

birth rates increase and death rates decrease

Question 4

stability

Answer 4

the ability of a living system to withstand or recover from externally imposed changes to stresses- provided that those stresses are not too severe

Question 5

inertia

Answer 5

the ability of a living system to resist being disturbed or altered

Question 6

constancy

Answer 6

the ability of the living system to maintain a certain size or keep its numbers within certain limits

Question 7

resilience

Answer 7

the ability of a living system to restore itself close to an original condition after being exposed to an outside disturbance that is not too drastic

Question 8

symbiosis

Answer 8

a biological relationship in which two dissimilar organisms live together in close association

Question 9

parasitism

Answer 9

type of symbiosis in which one organism gets its nutrients from feeding on another organism over long periods of time

Question 10

commensalism

Answer 10

type of symbiosis in which one organism benefits from the association and the other organism neither benefits nor is harmed

Question 11

mutualism

Answer 11

type of symbiosis relationship in which both organisms benefit from the association

Question 12

predation

Answer 12

a biological interaction in which one organism called a predator kills and eats another organism called prey

Question 13

parasitoid

Answer 13

an insect that feeds on a host during its larval stages and is free-living as an adult

Question 14

scavenger

Answer 14

an organism that feeds on a dead organism that was either killed by another organism or died of natural causes

Question 15

cultural management examples

Answer 15

crop rotation, irrigation, planting time, harvest time, soil testing, and plowing/tilling

Question 16

biological management examples

Answer 16

plant variety

Question 17

chemical management

Answer 17

last option, quick fix

Question 18

economic injury level

Answer 18

the number of organisms that would cause so much damage that the farmer would not make a profit

Question 19

economic threshold

Answer 19

the density of a pest at which a control treatment will provide an economic return