This quiz works best with JavaScript enabled. Home > Science > Earth > Ecology – Quiz 84 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 84 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the original source for all energy in an ecosystem? A) Water. B) Producers. C) Sun. D) Air. Show Answer Correct Answer: C) Sun. 2. A difference between photosynthesis and chemosynthesis A) Photosynthesis doesn't use light and chemosynthesis does. B) Photosynthesis makes sugar and chemosynthesis doesn't. C) Photosynthesis uses light and chemosynthesis doesn't. D) Photosynthesis doesn't make sugar and chemosynthesis does. Show Answer Correct Answer: C) Photosynthesis uses light and chemosynthesis doesn't. 3. A density-dependent limiting factor is A) A factor that changes after exponential growth. B) A limiting factoer that depends on population size; example-disease. C) An organism tht keeps eating and reproducing. D) When people keep reproducing until there's no more food to support them. Show Answer Correct Answer: B) A limiting factoer that depends on population size; example-disease. 4. Many people value biodiversity because it A) Provides natural resources. B) Provides foods and goods. C) Provides medicines. D) All of the above. Show Answer Correct Answer: D) All of the above. 5. The smallest level of organization listed below is ..... A) The biosphere. B) A community. C) A population. D) An ecosystem. Show Answer Correct Answer: C) A population. 6. What do plants make by using air, water, and energy from the Sun? A) Food. B) Heat. C) Soil. D) Wind. Show Answer Correct Answer: A) Food. 7. A producer? A) Eats other plants and animals. B) Eats dead plants or animals. C) Makes its own food. D) Makes toys for kids. Show Answer Correct Answer: C) Makes its own food. 8. Which two cycles are affected the most by fertilizers? A) Carbon cycle and water cycle. B) Carbon cycle and phosphorous cycle. C) Nitrogen cycle and phosphorous cycle. D) Carbon cycle and nitrogen cycle. Show Answer Correct Answer: C) Nitrogen cycle and phosphorous cycle. 9. The term "species" is synonymous with the term "breed" . A) True. B) False. Show Answer Correct Answer: B) False. 10. What is a Biotic factor? A) A population. B) A limiting factor. C) All living organisms inhabiting earth. D) None of above. Show Answer Correct Answer: C) All living organisms inhabiting earth. 11. What type of relationship results when food supply is limited? A) Climax Community. B) Parasitism. C) Commensalism. D) Competition. Show Answer Correct Answer: D) Competition. 12. 90% of energy lost to A) All answer. B) Heat. C) Respiration. D) Egestion. E) Excretion. Show Answer Correct Answer: A) All answer. 13. Which of the following describes an interaction between a biotic factor and an abiotic factor? A) A pair of birds build a nest in a tree. B) A black bear uses a cave for a winter home. C) A squirrel gathers nuts to store for winter. D) A vulture eats the remains of a wild pig. Show Answer Correct Answer: B) A black bear uses a cave for a winter home. 14. What's ECOSYSTEM? A) The adaptation of species. B) Living creatures+non living substances. C) Individual of the same species in an area. D) The whole of living species in an area. Show Answer Correct Answer: B) Living creatures+non living substances. 15. Which of the following heterotrophs consumes meat? A) Carnivore. B) Omnivore. C) Herbivore. D) Detritivore. Show Answer Correct Answer: A) Carnivore. 16. How does acid rain affect humans? A) Air pollution gets into our lungs and water. B) It burns our clothes. C) It makes us blind. D) It makes us blonde. Show Answer Correct Answer: A) Air pollution gets into our lungs and water. 17. Population density refers to how ..... a population is in a specific area. A) Big. B) Small. C) Crowded. D) All of the above. Show Answer Correct Answer: C) Crowded. 18. A square kilometer of forest has 200 deer. What is the term that is used to describe this number? A) Density-Dependent. B) Birth rate. C) Limiting factors. D) Population Density. Show Answer Correct Answer: D) Population Density. 19. If a natural disaster like a hurricane occurs and wipes out a large amount of biomass, what would most likely result? A) Carrying capacity would increae. B) Carrying capacity would decrease. C) Fresh water would increase. D) Habitat size would increase. Show Answer Correct Answer: B) Carrying capacity would decrease. 20. This biome has a constant mixing of cold and warm water currents and includes organism such as whales, sharks, and floating algae A) Open ocean. B) Coral reef. C) Beach. D) Lakes. Show Answer Correct Answer: A) Open ocean. ← PreviousNext →Related QuizzesScience QuizzesEcology Quiz 1Ecology Quiz 2Ecology Quiz 3Ecology Quiz 4Ecology Quiz 5Ecology Quiz 6Ecology Quiz 7Ecology Quiz 8Ecology Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books