Carbon Fixation Carbon?is present in the?atmosphere?in the form of?carbon dioxide gas Carbon is taken out of the atmosphere by plants to be used in?photosynthesis Plants are?autotrophs Autotrophs u...
Pyramids of Energy Pyramids of energy illustrate the?amount of energy contained?within the?biomass?of organisms at each trophic level The?length?of each box, or bar, represents the quantity of ener...
Chi-squared Test for Association Looking for associations between species The distribution of species in a habitat is?rarely random; it usually depends on factors such as soil type, water availabil...
Identification of Trophic Level Classifying species as autotrophs, consumers, detritivores, or saprotrophs A species can be classified as an autotroph, consumer, detritivore, or saprotroph on the b...
Wasted Energy - Heat The process of?respiration?in living organisms?releases heat as a by-product This applies in?producers, consumers, detritivores, and?saprotrophs This?heat energy is lost from e...
Initial Source of Energy The sun is the initial (first) source of energy for most food chains Light energy?from the sun?is converted by producers into chemical energy?stored in the tissues of plant...
Obtaining Inorganic Nutrients The individual organisms in an ecosystem need?organic molecules?to build their cells and tissues These molecules contain?carbon, hydrogen, oxygen, nitrogen, and phosph...
Community Species?do not exist by themselves in their own isolated environment; they?interact?with?other species, forming?communities A community can be defined as: Multiple populations of differen...
Autotroph vs Heterotroph Organisms need?energy in the form of?ATP?to survive The energy stored in ATP comes from other?organic molecules,?such as carbohydrates,?and is transferred during the proces...
