Freshwater Biology Of animal MCQs December 24, 2025March 13, 2024 by u930973931_answers 40 min Score: 0 Attempted: 0/40 Subscribe 1. . Freshwater biology is the scientific study of: (A) Terrestrial animals (B) Saltwater organisms (C) Freshwater organisms (D) Avian organisms 2. . Which of the following is not a characteristic of freshwater organisms? (A) Adaptation to low salinity (B) Ability to breathe underwater (C) Dependence on sunlight for photosynthesis (D) Adaptation to high oxygen levels 3. . What is the term for the zone of freshwater bodies where sunlight penetrates and photosynthesis can occur? (A) Profundal zone (B) Littoral zone (C) Limnetic zone (D) Aphotic zone 4. . Which of the following is not a major division of freshwater habitats? (A) Rivers and streams (B) Lakes and ponds (C) Oceans and seas (D) Wetlands and marshes 5. . What is the scientific study of freshwater ecosystems called? (A) Freshwater ecology (B) Limnology (C) Freshwater chemistry (D) Freshwater physics 6. . Which of the following is not a type of freshwater organism? (A) Fish (B) Mollusks (C) Echinoderms (D) Amphibians 7. . What is the primary source of energy for most freshwater ecosystems? (A) Sunlight (B) Thermal vents (C) Chemical energy (D) Hydrothermal energy 8. . Which of the following is not a major type of freshwater biome? (A) Rivers and streams (B) Lakes and ponds (C) Coral reefs (D) Wetlands and marshes 9. . What is the term for the process by which freshwater organisms convert sunlight into chemical energy? (A) Photosynthesis (B) Chemosynthesis (C) Autotrophy (D) Heterotrophy 10. . Which of the following is not a characteristic of freshwater algae? (A) Photosynthesis (B) Cellulose cell walls (C) Chlorophyll pigments (D) Heterotrophic nutrition 11. . What is the primary role of phytoplankton in freshwater ecosystems? (A) Predation (B) Herbivory (C) Decomposition (D) Parasitism 12. . Which of the following is not a major group of freshwater invertebrates? (A) Mollusks (B) Arthropods (C) Chordates (D) Annelids 13. . What is the term for the process by which freshwater organisms take in dissolved oxygen from water? (A) Respiration (B) Osmoregulation (C) Osmosis (D) Diffusion 14. . Which of the following is not a function of freshwater ecosystems? (A) Carbon sequestration (B) Oxygen production (C) Nitrogen fixation (D) Ozone depletion 15. . What is the term for the area where a river meets the ocean? (A) Estuary (B) Headwater (C) Confluence (D) Delta 16. . Which of the following is not a characteristic of freshwater fishes? (A) Possession of gills (B) Ectothermic (C) Live birth (D) Possession of scales 17. . What is the term for the study of freshwater animal behavior? (A) Ethology (B) Freshwater physiology (C) Freshwater ecology (D) Freshwater zoology 18. . Which of the following is not a major group of freshwater vertebrates? (A) Fish (B) Reptiles (C) Amphibians (D) Birds 19. . What is the primary role of zooplankton in freshwater ecosystems? (A) Predation (B) Herbivory (C) Decomposition (D) Parasitism 20. . Which of the following is not a major type of freshwater pollution? (A) Industrial waste (B) Agricultural runoff (C) Noise pollution (D) Thermal pollution 21. . What is the term for the process by which freshwater organisms excrete waste into the water? (A) Excretion (B) Osmoregulation (C) Diffusion (D) Filtration 22. . Which of the following is not a major group of freshwater invertebrates? (A) Mollusks (B) Arthropods (C) Chordates (D) Annelids 23. . What is the primary role of phytoplankton in freshwater ecosystems? (A) Predation (B) Herbivory (C) Decomposition (D) Parasitism 24. . Which of the following is not a function of freshwater ecosystems? (A) Carbon sequestration (B) Oxygen production (C) Nitrogen fixation (D) Ozone depletion 25. . What is the term for the area where a river meets the ocean? (A) Estuary (B) Headwater (C) Confluence (D) Delta 26. . Which of the following is not a characteristic of freshwater fishes? (A) Possession of gills (B) Ectothermic (C) Live birth (D) Possession of scales 27. . What is the term for the study of freshwater animal behavior? (A) Ethology (B) Freshwater physiology (C) Freshwater ecology (D) Freshwater zoology 28. . Which of the following is not a major group of freshwater vertebrates? (A) Fish (B) Reptiles (C) Amphibians (D) Birds 29. . What is the primary role of zooplankton in freshwater ecosystems? (A) Predation (B) Herbivory (C) Decomposition (D) Parasitism 30. . Which of the following is not a major type of freshwater pollution? (A) Industrial waste (B) Agricultural runoff (C) Noise pollution (D) Thermal pollution 31. . What is the term for the process by which freshwater organisms excrete waste into the water? (A) Excretion (B) Osmoregulation (C) Diffusion (D) Filtration 32. . Which of the following is not a major group of freshwater invertebrates? (A) Mollusks (B) Arthropods (C) Chordates (D) Annelids 33. . What is the primary role of phytoplankton in freshwater ecosystems? (A) Predation (B) Herbivory (C) Decomposition (D) Parasitism 34. . Which of the following is not a function of freshwater ecosystems? (A) Carbon sequestration (B) Oxygen production (C) Nitrogen fixation (D) Ozone depletion 35. . What is the term for the area where a river meets the ocean? (A) Estuary (B) Headwater (C) Confluence (D) Delta 36. . Which of the following is not a characteristic of freshwater fishes? (A) Possession of gills (B) Ectothermic (C) Live birth (D) Possession of scales 37. . What is the term for the study of freshwater animal behavior? (A) Ethology (B) Freshwater physiology (C) Freshwater ecology (D) Freshwater zoology 38. . Which of the following is not a major group of freshwater vertebrates? (A) Fish (B) Reptiles (C) Amphibians (D) Birds 39. . What is the primary role of zooplankton in freshwater ecosystems? (A) Predation (B) Herbivory (C) Decomposition (D) Parasitism 40. . Which of the following is not a major type of freshwater pollution? (A) Industrial waste (B) Agricultural runoff (C) Noise pollution (D) Thermal pollution