This quiz works best with JavaScript enabled. Home > Science > Ecology – Quiz 263 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Ecology Quiz 263 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. An organism that eats both animals and plants is a(n) A) Herbivore. B) Carnivore. C) Omnivore. D) Producer. Show Answer Correct Answer: C) Omnivore. 2. The organism at the beginning of the food chain is called? A) Producer. B) Consumer. C) Decoposer. D) Predator. Show Answer Correct Answer: A) Producer. 3. A jar has two fish in it. What will happen? A) Carbon dioxide will increase. B) Oxygen will increase. C) Carbon dioxide will decrease. D) Nitrogen will decrease. Show Answer Correct Answer: A) Carbon dioxide will increase. 4. An omnivore is a ..... A) Consumer that eats both plants and other animals. B) Consumer that eats only other animals. C) Consumer that eats only plants. D) None of above. Show Answer Correct Answer: A) Consumer that eats both plants and other animals. 5. Ecosystem includes both the biotic and abiotic factors. A) True. B) False. Show Answer Correct Answer: A) True. 6. The very first species to show up at the beginning of succession are called ..... A) Introduced species. B) Indicator species. C) Keystone species. D) Pioneer species. Show Answer Correct Answer: D) Pioneer species. 7. A penguin is white on its belly and black on its back so it harder to see underwater from above and below. A) Behavioral Adaptation. B) Physical/Structural Adaptation. Show Answer Correct Answer: B) Physical/Structural Adaptation. 8. Which of the following is a key characteristic of most invasive species? A) Ability to breathe in the air & in the water. B) Large, sharp teeth. C) Produce many offspring. D) Is a top predator. Show Answer Correct Answer: C) Produce many offspring. 9. Carbon cycles between the biotic & abiotic worlds through the processes of ..... A) Cellular respiration & transpiration. B) Transpiration & photosynthesis. C) Cellular respiration & photosynthesis. D) Evaporation & photosynthesis. Show Answer Correct Answer: C) Cellular respiration & photosynthesis. 10. A place in the environment where a living organisms lives and grows naturally is known as A) Biotic. B) Abiotic. C) Habitat. D) Interaction. Show Answer Correct Answer: C) Habitat. 11. Which one is an abiotic factor? A) Water. B) Tree. C) Worm. D) Wolf. Show Answer Correct Answer: A) Water. 12. An example of a biotic factor in an ecosystem would be A) The amount of rain it gets per year. B) The average temperature in the ecosystem. C) The rocks found there. D) The monkeys that live there. Show Answer Correct Answer: D) The monkeys that live there. 13. A keystone species is A) A single species that is not usually abundant in a community yet exerts strong control on the structure of a community. B) A symbiotic relationship in which one organism benefits and the other does not. C) Full range of physical and biological conditions in which an organism lives. D) Ability of an organism to survive. Show Answer Correct Answer: A) A single species that is not usually abundant in a community yet exerts strong control on the structure of a community. 14. Which of the following is the 1st order consumer? A) Beasts. B) Malnutrition. C) Herbivores. D) Executives. E) Parasites. Show Answer Correct Answer: C) Herbivores. 15. Why is the bottom of an energy pyramid larger than the top? A) Smallest amount of biomass so it can support the energy requirements of the organisms at lowest levels. B) The base must have the largest amount of biomass (shown as the widest bar) so it can support the energy requirements of the organisms at higher levels. Show Answer Correct Answer: B) The base must have the largest amount of biomass (shown as the widest bar) so it can support the energy requirements of the organisms at higher levels. 16. Pollution caused by pesticides and fertilizers is limited to areas close to the source (farms). A) True. B) False. Show Answer Correct Answer: B) False. 17. The living parts of an organisms environment are called its ..... A) Community. B) Habitat. C) Biotic factors. D) Abiotic factors. Show Answer Correct Answer: C) Biotic factors. 18. Which of these conditions to keep animals in would increase the energy at the end of the food chain the most? A) Keeping the animals cold and moving a lot. B) Keeping the animals warm and moving a lot. C) Keeping the animals cold and still. D) Keeping the animals warm and still. Show Answer Correct Answer: D) Keeping the animals warm and still. 19. ..... are the first organisms to colonize an area and begin the process of ecological succession. A) Foundational organisms. B) Introductory organisms. C) Primary organisms. D) Pioneer species. Show Answer Correct Answer: D) Pioneer species. 20. The variety of organisms considered at all levels from populations to ecosystems A) Biodiversity. B) Taxonomy. C) Binomial Nomenclature. D) Subspecies. Show Answer Correct Answer: A) Biodiversity. ← PreviousNext →Related QuizzesEcology Quiz 1Ecology Quiz 2Ecology Quiz 3Ecology Quiz 4Ecology Quiz 5Ecology Quiz 6Ecology Quiz 7Ecology Quiz 8Ecology Quiz 9Ecology Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books