This quiz works best with JavaScript enabled. Home > Science > Biology > Biology – Quiz 50 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Biology Quiz 50 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the best explanation for the continual changes in the classification system of organisms? A) All organisms struggle for existence and become extinct. B) All organisms compete to be at the top of the food chain. C) Technological advances have allowed scientists to better compare organisms. D) More species have been discovered, but scientists have not analyzed all the data. Show Answer Correct Answer: C) Technological advances have allowed scientists to better compare organisms. 2. Which is not a part of cell theory? A) All organisms are made of cells. B) All existing cells come from preexisting cells. C) All matter is composed of living cells. D) The cell is the most basic unit of life. Show Answer Correct Answer: C) All matter is composed of living cells. 3. What did Hooke first examine? A) Pond water. B) Plant cells. C) Cork. D) Animal fat. Show Answer Correct Answer: C) Cork. 4. Which adaptation is correct for a cactus? A) Good hearing to detect predators. B) Large feet to help walk on snow. C) Long deep roots to absorb water from soil. D) Sharp claws and teeth for killing prey. Show Answer Correct Answer: C) Long deep roots to absorb water from soil. 5. Which of the following are true of a sinusoid? I. it is involved in the exchange of materials between hepatocytes and bloodII. Kupffer cells contain microvilli for faster exchangeIII. blood from the hepatic artery and hepatic portal vein mixes within it A) I and II only. B) I and III only. C) II and III only. D) I, II and III. Show Answer Correct Answer: B) I and III only. 6. Ali found that the leaves of his favourite plant have turned purple . What nutrient is the plant lacking of? A) Phosphorus. B) Magnesium. C) Nitrogen. D) Carbon. Show Answer Correct Answer: A) Phosphorus. 7. What is the study of animals called? A) Biology. B) Botany. C) Anatomy. D) Zoology. Show Answer Correct Answer: D) Zoology. 8. How many MAIN branches of biology are there A) 4. B) 7. C) 10. D) 3. Show Answer Correct Answer: D) 3. 9. The breakdown of glucose is called A) Photosynthesis. B) Transpiration. C) Respiration. D) Digestion. Show Answer Correct Answer: C) Respiration. 10. Paleobotany is to the study of fossil plants as parasitology is to to study of ..... A) Humans. B) Parasites. C) Flowers. D) Finger nails. Show Answer Correct Answer: B) Parasites. 11. This type of vertebrate uses gills to take in oxygen from the water? A) Reptile. B) Fish. C) Bird. D) Mammal. Show Answer Correct Answer: B) Fish. 12. Which of the following are needed for chlorophyll synthesis? A) Calcium and magnesium. B) Iron and nitrogen. C) Nitrogen and magnesium. D) Calcium and iron. Show Answer Correct Answer: C) Nitrogen and magnesium. 13. Euglena is a unicellular organism that feeds on bacteria and uses CO2 as a carbon source. Which described the nutrition of this organism? A) Autotrophic only. B) Heterotrophic only. C) Saprotrophic only. D) Autotrophic and heterotrophic. Show Answer Correct Answer: D) Autotrophic and heterotrophic. 14. Where is DNA and RNA made? A) Nucleus. B) Cytoplasm. C) Mitochondria. D) ER. Show Answer Correct Answer: A) Nucleus. 15. When you step out into the cold, your body shivers in order to keep its temperature at 98.6F. A) All living things use energy. B) All living things contain cells. C) All living things maintain homeostasis. D) All living things grow. Show Answer Correct Answer: C) All living things maintain homeostasis. 16. Two different populations of birds live in the same area and eat the same types of food. Which most likely describes the relationship between these two populations of birds? A) Competition. B) Mutualism. C) Parasitism. D) Predator-prey. Show Answer Correct Answer: A) Competition. 17. Transpiration helps the plant A) Make more sugars at night. B) Move water from the roots to the stem and leaves. C) Move sugars from the leaf to be stored in the stem & roots. D) Make more chloroplasts. Show Answer Correct Answer: B) Move water from the roots to the stem and leaves. 18. In this equation:C6H12O6 + 6O2 + ADP + P $\rightarrow$6CO2 + 6H2O + Molecule AWhat would be the molecule shown as molecule A? A) Phosphate. B) ADP. C) ATP. D) Pyruvate. Show Answer Correct Answer: C) ATP. 19. Observations made during an experiment are considered: A) Data. B) Problems. C) Conclusions. D) Questions. Show Answer Correct Answer: A) Data. 20. Which organelles are only found in plant cells? A) Cell wall and Chloroplasts. B) Ribosomes and Golgi Bodies. C) Endoplasmic Reticulum and Cell Wall. D) Nucleus and Cell membrane. Show Answer Correct Answer: A) Cell wall and Chloroplasts. ← PreviousNext →Related QuizzesScience QuizzesBiology Quiz 1Biology Quiz 2Biology Quiz 3Biology Quiz 4Biology Quiz 5Biology Quiz 6Biology Quiz 7Biology Quiz 8Biology Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books