Ecosystems - Matter Cycles and Food Webs
Questions and Answers
trophic level - ✅✅each of several hierarchical levels in an ecosystem, comprising organisms that
share the same function in the food chain and the same nutritional relationship to the primary sources
of energy.
Biomass - ✅✅total amount of living tissue within a given trophic level
Bioaccumulation - ✅✅The accumulation of a substance, such as a toxic chemical, in various tissues of
a living organism.
Photosynthesis - ✅✅process by which plants and some other organisms use light energy to convert
water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches
cellular respiration - ✅✅Process that releases energy by breaking down glucose and other food
molecules in the presence of oxygen
nitrogen fixation - ✅✅process of converting nitrogen gas into nitrogen compounds that plants can
absorb and use
Questions and Answers
trophic level - ✅✅each of several hierarchical levels in an ecosystem, comprising organisms that
share the same function in the food chain and the same nutritional relationship to the primary sources
of energy.
Biomass - ✅✅total amount of living tissue within a given trophic level
Bioaccumulation - ✅✅The accumulation of a substance, such as a toxic chemical, in various tissues of
a living organism.
Photosynthesis - ✅✅process by which plants and some other organisms use light energy to convert
water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches
cellular respiration - ✅✅Process that releases energy by breaking down glucose and other food
molecules in the presence of oxygen
nitrogen fixation - ✅✅process of converting nitrogen gas into nitrogen compounds that plants can
absorb and use
