Ch. 4 & 5

Question 1

number of organisms per unit of living area

Answer 1

population density

Question 2

environmental factor, such as predation, disease, and competition, that depends on the number of members in a population per unit area

Answer 2

density dependant

Question 3

environmental factor, such as storms and extreme heat or cold, that affects populations regardless of their density

Answer 3

density independant

Question 4

movement of individuals away from a population

Answer 4

emigration

Question 5

movement of individuals into a population

Answer 5

immigration

Question 6

largest number of individuals in a species that an environment can support long-term

Answer 6

carrying capacity

Question 7

study of human populations based on size, density, movement, distribution, and birth and death rates

Answer 7

demography

Question 8

arrangement of a population in its environment

Answer 8

dispersion

Question 9

the disappearance of a species when the last of its members dies

Answer 9

extinction

Question 10

number of different species living in a specific area

Answer 10

biodiversity

Question 11

any material or organisms in the biosphere, including water, soil, fuel, and plants and animals

Answer 11

natural resource

Question 12

habitat loss from separation of an ecosystem into small pieces of land

Answer 12

habitat fragmentation

Question 13

water pollution from nitrogen-rich and phosphorus-rich substances flowing into waterways, causing algal overgrowth

Answer 13

eutrophication

Question 14

nonnative species deliberately or accidentally introduced into a new species

Answer 14

introduced species

Question 15

any resource replaced by natural processes more quickly than it is consumed

Answer 15

renewable resource

Question 16

any natural resource available in limited amounts or replaced extremely slowly by natural processes

Answer 16

nonrenewable resource

Question 17

use of resources at a rate that they can be replaced or recycled

Answer 17

sustainable use

Question 18

a species that is only found in that region and nowhere else in the world

Answer 18

endemic species

Question 19

technique using living organisms to detoxify a polluted area

Answer 19

bioremediation

Question 20

technique of adding essential materials to a degraded ecosystem

Answer 20

biological augmentation