Ecosystems exam 4

Question 1

interacting population in given geographic area

Answer 1

Community

Question 2

all organisms (biotic) and the non-living (abiotic) environment with which they interact

Answer 2

Ecosystem

Question 3

What keeps the ecosystem going

Answer 3

-passage of energy through ecosystem
-transfer of chemicals within ecosystem

Question 4

Autotrophs (producers) do

Answer 4

store energy as food

Question 5

Most producers are photoautotrophs which

Answer 5

store light energy in food

Question 6

Primary productivity is

Answer 6

the amount of energy stored by producers within year reported as energy of biomass

Question 7

Biomass is

Answer 7

amount of living, organic material in ecosystem

Question 8

Strophic levels describe

Answer 8

organisms source of energy

Question 9

Destructors consume

Answer 9

detritus

Question 10

Detritus is

Answer 10

animal waste, plant litter, dead organisms

Question 11

Energy leaves ecosystem as

Answer 11

heat, must’ve be replenished in order for ecosystem to continue

Question 12

a chemical acquire from the environment and needed for the survival, growth, and development of an organism

Answer 12

Nutrient

Question 13

chemicals cycle between

Answer 13

abiotic sections of ecosystem and community

Question 14

atmospheric nitrogen is fixed by

Answer 14

bacteria

Question 15

plants incorporate

Answer 15

fixed nitrogen

Question 16

consumer incorporate

Answer 16

nitrogen from plants

Question 17

detritivores, decomposers release

Answer 17

nitrogen from waste

Question 18

what can re-renter plants

Answer 18

nitrogen

Question 19

bacteria convert fixed nitrogen back to

Answer 19

atmospheric form

Question 20

ecosystem services
provisioning

Answer 20

food, medicines, raw materials

Question 21

ecosystem services
regulation

Answer 21

control of climate, waste

Question 22

ecosystem services
supporting

Answer 22

soil formation, water purification, pollination

Question 23

ecosystem services
cultural

Answer 23

recreational, spiritual benefits

Question 24

Mitigation is

Answer 24

reducing the severity, seriousness, or painfulness of something

Question 25

Producers form

Answer 25

first trophic level

Question 26

consumers form

Answer 26

remaining trophic levels

Question 27

second trophic level is

Answer 27

primary consumers

Question 28

primary consumers do what

Answer 28

feed on producers, such as herbivores

Question 29

third trophic level is

Answer 29

secondary consumers

Question 30

secondary consumers do what

Answer 30

feed on primary consumers

Question 31

detritus feeders, decomposers form

Answer 31

additional trophic level

Question 32

about what percent of energy reaches next trophic level

Answer 32

10%

Question 33

pyramid has

Answer 33

4-5 levels due to energy loss

Question 34

atmospheric carbon fixed by

Answer 34

autotrophs