TF
NPP is the difference between Gross Primary productivity and cellular respiration.
TRUE
A sequence of organisms that serves as source of food or Energy for the next level of organisms.
Food Chain
A complex network of interconnected food chains.
Food Web
A kcal is used to ....
a. Measure the number of trophic levels.
b. Measure the amount of energy.
c. Measure the weight of organisms.
d. Measure the temperature of the sun
e. Measure the number of producers.
b. Measure the amount of energy.
With each transfer of energy from one trophic level to the next, about ____ of the energy is lost.
a. 10%
b. 40%
c. 20%
d. 90%
e. 60%
d. 90%
Food chains and food webs demonstrate how nutrients cycle within ecosystems.
FALSE
The rate at which producers convert radiant energy into chemical energy.
Gross Primary Productivity
The rate at which producers use photosynthesis to produce & store chemical energy minus the rate at which they use some of this stored chemical energy through respiration.
Net Primary Productivity
Which equation best represents NPP, or net primary productivity?
a. NPP= sun’s energy + chemical energy + cellular respiration
b. NPP= sun’s energy - chemical energy + cellular respiration.
c. NPP= sun’s energy - (chemical energy - cellular respiration)
d. NPP= (sun’s energy --> chemical energy) - cellular respiration
e. NPP= (sun’s energy --> chemical energy) + cellular respiration.
d. NPP= (sun’s energy --> chemical energy) - cellular respiration
Which of the following is correct?
a. A food chain is a complex network of ecosystems.
b. A food web is a complex network of food chains.
c. A food web is a complex network of producers.
d. A food web is a complex network of ecosystems.
e. A food chain is a complex network of food webs.
b. A food web is a complex network of food chains.
Producers are the source of energy in ecosystems.
TRUE