Multiple ChoiceA type of ecological relationship called __________ involves one organism living at the expense of another organism. 1073views1rank
Multiple ChoiceWhich example below is a correct statement about Bacteroides thetaiotaomicron, a bacterium that lives in the human intestines? 949views
Textbook QuestionWhat do some photosynthetic bacteria use as a source of electrons instead of water? a. Oxygen (O2) b. Hydrogen sulfide (H2S) c. Organic compounds (e.g., CH3COO−) d. Nitrate (NO3-)1218views
Textbook QuestionPhotoautotrophs use a. Light as an energy source and CO₂ as a carbon sourceb. Light as an energy source and methane as a carbon sourcec. N₂ as an energy source and CO₂ as a carbon sourced. CO₂ as both an energy source and a carbon source1699views