Bio-148 Unit 7 Exam Questions With All Correct Answers Verified Answers 2025 Marking Scheme New Update

Bio-148 Unit 7 Exam Questions With All Correct Answers Verified Answers 2025 Marking Scheme New Update Trophic level - Answer- Each of several hierarchical levels in an ecosystem, comprising organisms that share the same function in the food chain and the same nutritional relationship tp the primary sources of energy Producer - Answer- Organisms in an ecosystem that produce biomass from inorganic compounds (autotrophs) Primary consumer - Answer- Organisms that eat producers (herbivores) Secondary consumer - Answer- Organism that eats primary consumers (carnivores and omnivores) Tertiary consumer - Answer- An organism that feeds on secondary consumers Population - Answer- A group of individual from the same species living in the same geographical area Community - Answer- An interacting group of different species that live in a common area Ecosystem - Answer- Interaction of a community of organisms with their environment Decomposer - Answer- An organism that feeds on detritus and chemically decomposes organic material. Gram positive - Answer- Describing bacteria that look purple when treated with a gram stain. These bacteria have cell walls composed of a thick layer of peptidoglycan. Gram negative - Answer- Describing bacteria that look pink when treated with a gram stain. These have an outer layer over the peptidoglycan which is also very thin. Binary fission - Answer- Asexual reproduction used by prokaryotes, used to produce two identical cells from one cell. Cyanobacteria - Answer- A lineage of photosynthetic bacteria formerly known as blue-green algae. Likely the first life-forms to carry out oxygenic photosynthesis. Extremophile - Answer- Bacterium or Archean that thrives in an extreme environment Saprobe - Answer- Organisms that feed primarily on dead organisms Symbiosis - Answer- Any close and prolonged physical relationship that is mutually beneficial between individuals of two different species. Protists - Answer- single-celled or simple multicellular eukaryotic organisms that generally do not fit in any other kingdom Animal - Answer- A member of eukaryotes whose members typically have a complex, large, multicellular body, eat other organisms, and are mobile.