BIOS 242 Exam 2 Questions with 100% Correct Answers

Organic Nutrient Correct Answer An organism that contains carbon and hydrogen Inorganic Nutrient Correct Answer An organism that does not contan carbon and hydrogen Phototroph Correct Answer An organism that gains energy from light through photosynthesis Heterotroph Correct Answer An organism that must obtain carbon in an organic form - they are dependent on other life forms Chemotroph Correct Answer An organism that gains energy from chemical compounds - this means they eat things. Harvesting energy from the things they eat. Autotroph Correct Answer An organism that gets its source of carbon from carbon dioxide an iorganic carbon source - referred to as the "self feeder"; They are NOT nutritionally dependent on other living things Photoautotroph Correct Answer An organism that gains its energy from light rays and its carbon source from CO2 in the air Examples of a photoautotroph? Correct Answer Photosynthetic organisms - algae, plants, Cyanobacteria What kind of organism is the basis of most food webs? Correct Answer Photoautotrophs Chemoautotroph Correct Answer An organism that gets its energy from eating things and gets its carbon source from inorganic compounds Examples of a Chemoautotroph Correct Answer Only certain bacteria/archaea - methanogens, deep-sea vent bacteria Lithoautotroph Correct Answer gets energy from inorganic materials - can actually digest rocks Chemoheterotrophs Correct Answer derive energy from chemical energy in the food consumed; carbon source also comes from the food consumed What are humans classified as? Correct Answer Chemoheterotrophs