Republic of the Philippines Department of Education Region IV-A CALABARZON SCHOOLS DIVISION OF BATANGAS PROVINCE SAN JUAN EAST SUB-OFFICE TIPAS INTEGRATED NATIONAL HIGH SCHOOL Tipas, San Juan, Batangas GRADE 11 EARTH AND LIFE SECOND PERIODICAL TEST NAME:____________________________ SECTION:________________________ DATE:_______________ DIRECTION: CHOOSE THE LETTER OF THE BEST ANSWER 1.Which of the following is a traditional characteristic used to define life? A. Ability to fly B. Consciousness C. Metabolism D. Intelligence 2. Why do scientists consider viruses to be on the borderline of living and non-living? A. They can reproduce independently B. They have no genetic material C. They require a host to replicate D. They perform photosynthesis 3. What does the discovery of extremophiles suggest about the conditions necessary for life? A. Life can only exist in mild environments B. Life may adapt to extreme conditions C. Life must rely on sunlight D. Life cannot survive without oxygen 4. Which situation best demonstrates how new evidence can reshape our definition of life? A. A new species of bird is found in the tropics B. Scientists create a self-replicating synthetic cell C. A fossil of a dinosaur is discovered D. A plant is genetically modified for drought resistance 5. How does synthetic biology challenge the traditional view of life? A. It proves that all life is artificial B. It shows that life can be created from non-living materials C. It confirms that DNA is not essential D. It eliminates the need for reproduction 6. What was the primary goal of the Miller-Urey experiment conducted in 1953? A. To discover extraterrestrial life B. To synthesize DNA from scratch C. To simulate early Earth conditions and test for organic molecule formation D. To measure volcanic activity on ancient Earth 7. Why were water vapor, methane, ammonia, and hydrogen used in the Miller-Urey experiment? A. They are found in modern cells B. They represent gases believed to be present in Earth’s early atmosphere C. They are required for photosynthesis D. They are used in industrial chemical reactions 8. If you were to replicate the Miller-Urey experiment today, which modern tool would best help analyze the resulting compounds? A. Telescope B. Mass spectrometer C. Microscope D. Centrifuge 9. What does the outcome of the Miller-Urey experiment suggest about the origin of life? A. Life began in space and arrived via meteorites B. Complex organisms formed spontaneously C. Organic molecules can form under prebiotic conditions D. DNA was the first molecule of life 10.Which of the following is a unifying theme in biology that explains the diversity and unity of life? A. Photosynthesis B. Evolution C. Respiration D. Digestion 11. How does the theme of energy flow help explain relationships in an ecosystem? A. It shows how organisms compete for shelter B. It illustrates how energy moves from producers to consumers C. It explains how organisms reproduce D. It describes how organisms migrate 12. Which example best demonstrates the theme of structure and function in living organisms? A. Streamlined body of a fish aiding in swimming B. A tree shedding leaves in autumn C. A bird singing to attract a mate D. A mushroom growing in damp soil 13 How does the concept of interdependence among organisms reflect the theme of ecological relationships? A. It shows that organisms live in isolation B. It highlights how species rely on each other for survival C. It proves that all organisms are genetically identical D. It suggests that ecosystems are static 14.What does the theme of homeostasis reveal about how organisms interact with their environment? A. Organisms ignore environmental changes B. Organisms adapt to maintain internal balance C. Organisms always change their environment D. Organisms rely on predators for stability 15. Which organelle is primarily responsible for producing energy in the form of ATP? A. Nucleus B. Ribosome C. Mitochondrion D. Golgi apparatus 16. Why is the cell membrane considered selectively permeable? A. It allows all substances to pass freely B. It blocks all molecules from entering C. It controls which substances enter and exit the cell D. It only allows water to pass through 17. A scientist observes a cell actively transporting ions against their concentration gradient. Which cellular process is being demonstrated? A. Passive diffusion B. Osmosis C. Active transport D. Facilitated diffusion 18. How does the structure of the endoplasmic reticulum relate to its function in the cell? A. Its rigid walls store genetic material B. Its folded membranes increase surface area for protein and lipid synthesis C. Its circular shape helps with cell division D. Its outer layer digests waste 19. If you were to design a synthetic cell capable of photosynthesis, which organelle would be essential to include? A. Mitochondria B. Chloroplast C. Ribosome D. Lysosome 20. What is the primary pigment responsible for capturing light energy in photosynthetic organisms? A. Hemoglobin B. Melanin C. Chlorophyll D. Keratin 21. Why is sunlight essential for photosynthesis? A. It provides heat for enzyme activity B. It activates the roots to absorb water C. It supplies energy to convert carbon dioxide and water into glucose D. It helps plants absorb nutrients from soil 22. Which condition would most likely reduce the rate of photosynthesis in a plant? A. Increased carbon dioxide levels B. Bright sunlight C. Lack of water D. Presence of chloroplasts 23. How do the light-dependent and light-independent reactions of photosynthesis work together? A. They both occur in the mitochondria B. Light-dependent reactions produce oxygen, while light-independent reactions produce water C. Light-dependent reactions generate ATP and NADPH used in the light-independent reactions to form glucose D. They are unrelated processes 24. If you were to design an experiment to test the effect of light intensity on photosynthesis, what variable would you measure? A. Leaf color B. Oxygen production rate C. Root length D. Soil temperature 25. What is the original source of energy for most life on Earth? A. Oxygen B. Water C. The Sun D. Glucose 26. How do producers like plants convert environmental energy into usable chemical energy? A. By absorbing nutrients from soil B. Through cellular respiration C. By photosynthesis, converting sunlight into glucose D. By consuming other organisms 27. Which of the following best illustrates how energy flows from the environment to a human cell? A. Sunlight → plant → human eats plant → glucose used in cellular respiration B. Sunlight → water → human drinks water → energy released C. Sunlight → air → human breathes → energy absorbed D. Sunlight → moon → human sees light → energy stored 28. What role do mitochondria play in the energy flow within cells? A. They capture sunlight for photosynthesis B. They store water for hydration C. They convert chemical energy in glucose into ATP D. They produce oxygen for the cell 29. How does the energy stored in glucose become available to cells? A. Through photosynthesis in the nucleus B. By diffusion across the cell membrane C. Through cellular respiration in mitochondria D. By osmosis in the cytoplasm 30. What is the primary source of energy for most life on Earth? A. Oxygen B. Glucose C. The Sun D. ATP 31. How do autotrophs obtain energy? A. By consuming other organisms B. By absorbing nutrients from soil C. By converting sunlight into chemical energy through photosynthesis D. By breaking down proteins 32. Which process allows cells to release energy stored in glucose? A. Photosynthesis B. Fermentation C. Cellular respiration D. Digestion 33. If you were to design an energy flow diagram for an ecosystem, which sequence would be most accurate? A. Sun → decomposer → consumer → ATP B. Sun → producer → consumer → ATP C. Sun → consumer → producer → ATP D. Sun → ATP → producer → consumer 34. What is the main molecule used by cells to store and transfer energy? A. DNA B. ATP C. Glucose D. Oxygen 35. What role does oxygen play in energy production in most organisms? A. It breaks down proteins B. It helps convert glucose into usable energy during cellular respiration C. It stores energy in cells D. It prevents energy loss 36. Why do organisms need energy? A. To maintain body temperature only B. To perform essential life functions like growth, repair, and movement C. To produce waste materials D. To prevent reproduction 37. A plant wilts due to lack of sunlight. What energy-related process is most affected? A. Cellular respiration B. Digestion C. Photosynthesis D. Fermentation 38. How does energy flow from food to cellular activity in animals? A. Food is stored in the nucleus for later use B. Food is broken down into glucose, which is converted into ATP through cellular respiration C. Food is used directly by muscles without processing D. Food is absorbed and turned into oxygen 39. What is the term for reproduction that involves only one parent and no fusion of gametes? A. Sexual reproduction B. Asexual reproduction C. Pollination D. Fertilization 40.What is the role of seeds in plant reproduction? A. They absorb water from the soil B. They store sunlight for photosynthesis C. They contain the embryo that grows into a new plant D. They prevent pollination 41. Which method of reproduction is being used when a gardener propagates a plant by stem cuttings? A. Sexual reproduction B. Cross-pollination C. Asexual reproductionD. Self-fertilization 42. How do the structures of flowers support sexual reproduction in plants? A. Petals absorb sunlight for energy B. Stamens and pistils facilitate the production and transfer of gametes C. Leaves store pollen D. Roots help in fertilization 43. What part of the flower develops into a fruit after fertilization? A. Petal B. Ovary C. Anther D. Sepal 44. What is the function of the fruit in relation to the seed? A. It provides energy for photosynthesis B. It protects the seed and aids in its dispersal C. It absorbs nutrients from the soil D. It produces pollen 45. How does the ovary of a flower relate to the structure of a fruit and the development of seeds? A. The ovary becomes the seed while the ovule turns into the fruit. B. The ovary develops into the fruit, and the ovules become the seeds. C. The petals transform into the fruit, and the stamens form the seeds. D. The ovule changes into the flower, and the ovary forms the leaves. 46. Which statement best explains why not all flowers develop into fruits? A. Only flowers with colorful petals become fruits B. Flowers must be pollinated and fertilized to form fruits C. All flowers automatically become fruits D. Flowers that bloom at night cannot produce fruits 47. If you were to design a diagram showing the transformation from flower to fruit to seed, which sequence would be most accurate? A. Petal → Seed → Fruit B. Ovary → Ovule → Seed C. Flower → Ovary → Fruit → Seed D. Anther → Fruit → Seed 48. How are seeds related to the ovules of a flower? A. Seeds are formed from the ovules after fertilization B. Seeds are formed from petals C. Seeds are produced by the anther D. Seeds are stored in the stem 49. How does asexual reproduction in animals like hydra differ from sexual reproduction in mammals? A. Asexual reproduction involves two parents B. Asexual reproduction creates genetically identical offspring C. Sexual reproduction produces clones D. Sexual reproduction does not involve gametes 50. Which reproductive strategy is most advantageous for survival in unstable environments?
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