Q2 Academic Test Grade 7 Science Assessment Tool PDF

Republic of the Philippines Department of Education REGION III-CENTRAL LUZON SCHOOLS DIVISION OF CITY OF SAN FERNANDO SECOND QUARTER TEST IN SCIENCE 7 Name:_____________________________...

Republic of the Philippines Department of Education REGION III-CENTRAL LUZON SCHOOLS DIVISION OF CITY OF SAN FERNANDO SECOND QUARTER TEST IN SCIENCE 7 Name:______________________________________________ Score: ________ Grade & Section: _____________________ Date: _________ Directions: Read each item carefully. Write the CAPITAL LETTER of the correct answer on the space provided before each item. ____ 1. Where should a microscope be placed for storage to keep it in good condition? A. near a window with sunlight C. in a damp or moist environment B. on a high shelf without a cover D. in a dry, dust-free cabinet or case ____ 2. Which of the following is NOT a proper method for handling microscopes?? A. Carry the microscope with one hand. B. Use lens paper when cleaning the objectives. C. Always use fine adjustment when using high power. D. Remove the slide before putting the microscope away. For items 3 to 5, refer to the diagram below: ____ 3. Which of the following is the lens found at the top of the microscope that you look through to observe the specimen that further magnifies the image produced by the objective lens.? A. 1 B. 2 C. 3 D. 4 ____ 4. Maria needs to raise the body of the microscope to focus on the specimen she is studying using the low power objective. Which of the following should she manipulate? A. 1 B. 3 C. 5 D. 7 ____ 5. Pedro was asked by his teacher to transfer the compound microscope to the next room. Which parts should Pedro be holding in carrying the microscope properly? A. 2 and 4 B. 3 and 6 C. 4 and 8 D. 5 and 10 ____ 6. A Grade 7 student placed the onion specimen on a slide and placed a cover slip over it. The purpose why the student covers the specimen is to: A. protect the cells. B. keep the cells flat. C. get a better view of the cells. D. prevent the onion cells from falling of the slide.  Republic of the Philippines Department of Education REGION III-CENTRAL LUZON SCHOOLS DIVISION OF CITY OF SAN FERNANDO ____ 7. Which technique would best help you focus on a cell structure, such as the nucleus, when viewing it under a microscope? A. Adjusting the light source to maximum brightness. B. Using the coarse adjustment knob at high magnification. C. Placing the slide on the microscope stage without securing it. D. Starting with the low power objective and then switching to high power objective. ____ 8. An electron microscope uses beams of electrons as a source of light that can magnify a specimen up to 10,000,000 times. Jose was able to observe a cell part under an electron microscope as shown below. What do you think is the cell part he saw? A. centriole C. ribosome B. mitochondrion D. vesicle For items 9 and 10, refer to the passage below: A group of Grade 7 students gathered around a lab table, eagerly awaiting their turn to observe an onion cell under the microscope. Their science teacher, Ms. Ramirez, guided them step-by-step as they prepared their slide. First, they placed a thin slice of onion skin on the slide and added a drop of iodine to stain the cells, making them easier to see. As Dahlia adjusted the microscope's focus, she gasped. "Wow, I can actually see the cells!" she exclaimed, calling her friends over. "Look, there’s the cell wall and the nucleus right there!" Jose, leaning in, noticed the brick-like pattern of the cells. "This is so cool! I didn’t think plant cells would look so organized." Each student took turns adjusting the focus and identifying the cell parts they had learned about. With Ms. Ramirez's guidance, they discussed the purpose of each part, making connections to what they had learned in class. ____ 9. Dahlia noticed the cell wall and nucleus of the onion cell. What other structure would she likely see in a plant cell under a microscope, even if it wasn’t as clearly visible? A. cytoplasm C. nucleus B. mitochondrion D. ribosome ____ 10. Ms. Ramirez showed a diagram of the plant cell they have observed under the microscope as shown below. Which of the following is the CORRECT label for parts X and Y? A. X is the cell membrane and Y is the cell wall. B. X is the nucleus, and Y is the cell membrane. C. X is the nucleus, and Y is the cell wall. D. X is the cell wall and Y is the nucleus.  Republic of the Philippines Department of Education REGION III-CENTRAL LUZON SCHOOLS DIVISION OF CITY OF SAN FERNANDO ____ 11. Which of the following is a characteristic of multicellular organisms? A. lack specialized cells B. composed of a single cell C. can only reproduce asexually D. made up of many specialized cells ____ 12. Why do multicellular organisms have increased complexity compared to unicellular organisms?? A. They consist of many specialized cells working together. B. They have a larger surface area-to-volume ratio. C. They lack cell specialization. D. They have more DNA. ____ 13. The T-charts below shows the difference between unicellular and multicellular organisms. Which T-chart is CORRECT? A. C. Unicellular Multicellular Unicellular Multicellular one cell many cells one cell many cells human bacteria bacteria human macroscopic reproduce usually reproduce reproduce asexually asexually asexually or sexually B. D. Unicellular Multicellular Unicellular Multicellular many cells one cell many cells one cell bacteria human humans bacteria complex macroscopic or usually reproduce reproduce microscopic asexually asexually or sexually ____ 14. Which of the following are present in plant cell and are absent in animal cell? A. cell wall and chloroplast B. lysosomes and ribosomes C. Golgi bodies and mitochondria D. cell membrane and cytoplasm ____ 15. The parts of cells A, B, C, and D are shown in the table below. A check (/) indicates the presence of the part of the cell. Cell A B C D nucleus / / / / cytoplasm / / / / cell membrane / / / / cell wall / / chloroplast / Which of the following is a plant cell? A. cell A only C. cell D only B. cell A and C D. cell C and D  Republic of the Philippines Department of Education REGION III-CENTRAL LUZON SCHOOLS DIVISION OF CITY OF SAN FERNANDO ____ 16. Which of the following structures is present in both plant cell and animal cell? I. cell wall II. centriole III. chloroplast IV. mitochondria V. nucleus VI. ribosome A. I, II, and III C. IV, V, and VI B. II, III, and IV D. I, IV, V, and VI ____ 17. The table below provides some information about three cells X, Y, and Z. A check (/) indicates the presence of the part of the cell? Part of the Cell Cell X Cell Y Cell Z Nucleus / / / Cell wall / Cell membrane / / / Cytoplasm / / / Chloroplast / Which of the following statements is CORRECT? A. Cells X, Y, and Z are animal cells. C. Cell Z is a plant cell. B. Cell Y and Z are animal cells. D. Cell X is a plant cell. ____ 18. Which of the following types of cell division is primarily responsible for growth and repair in multicellular organisms? A. binary fission C. meiosis B. budding D. mitosis ____ 19. Which type of cell division reduces the chromosome number by half in the resulting cells? A. binary fission C. meiosis B. cytokinesis D. mitosis ____ 20. Mitosis and meiosis are two types of cell division. Which one results in daughter cells that are genetically identical to the parent cell?? A. binary fission C. mitosis B. meiosis D. spore formation ____ 21. Why is mitosis important for the growth and repair of tissues in multicellular organisms? A. It creates genetically unique cells. B. It only occurs in reproductive cells. C. It produces cells with half the chromosome number. D. It creates identical cells that replace old or damaged cells. ____ 22. Which of the following explains why mitosis is important for skin repair after an injury? A. Mitosis produces new cells identical to the damaged ones to replace them. B. Mitosis reduces the chromosome number, helping cells regenerate. C. Mitosis increases genetic variation to heal the injury. D. Mitosis produces specialized reproductive cells.  Republic of the Philippines Department of Education REGION III-CENTRAL LUZON SCHOOLS DIVISION OF CITY OF SAN FERNANDO ____ 23. Potato (Solanum tuberosum) has a chromosome number of 24. If it undergoes mitosis, how many chromosomes does each daughter cells have? A. 12 B. 24 C. 36 D. 48 For items 24 to 26, refer to the diagram below. The diagram shows the stages of meiosis, and each stage is labelled from A to H. ____ 24. Crossing over is the exchange of genetic material between homologous chromosomes that may lead to genetic variation among multicellular organisms. In which stage does crossing over happen? A. stage A C. stage E B. stage C D. stage H ____ 25. Which of the following events occur during stage G? A. Homologous chromosomes separate and move to the opposite poles of the cell. B. Sister chromatids separate and move to the opposite poles of the cell. C. Homologous chromosomes pair up and crossing over happens D. Chromosomes line up along the equatorial plane of the cell. E. Four haploid chromosomes are produced. ____ 26. Which of the following about stage H is INCORRECT? A. Cytokinesis occurs. B. Telophase II occurs. C. Diploid cells are produced. D. Four daughter cells are produced. ____ 27. The combining of chromosomes from genetically different gametes occurs during: A. crossing over C. gamete formation B. fertilization D. meiosis ____ 28. Which of the following is the main function of gametes in sexual reproduction? A. to form zygotes B. to increase genetic diversity C. to create identical offspring D. to provide nourishment to the developing embryo ____ 29. How does fertilization maintain or restore the chromosome number in offspring? A. by combining two cells with half the chromosome number from each parent B. by combining two cells with double the chromosome number C. by reducing the chromosome number in each gamete D. by copying all chromosomes from the parent cells  Republic of the Philippines Department of Education REGION III-CENTRAL LUZON SCHOOLS DIVISION OF CITY OF SAN FERNANDO ____30. Which of the following best describes a zygote? A. A cell formed by the fusion of two gametes, restoring the chromosome number. B. A cell identical to the parent cells, with twice the chromosome number. C. A cell with half the chromosome number, resulting from meiosis. D. A reproductive cell that divides by meiosis. ____ 31. Why is it important that gametes contain only half the number of chromosomes? A. to increase the total number of chromosomes in the species B. to ensure that offspring have fewer chromosomes than their parents C. to allow each parent to contribute identical chromosomes to the offspring D. to allow fertilization to restore the full chromosome number in the offspring ___ 32. Which of the following statements correctly explains how offspring receive genetic information from both parents? A. They receive only the mother’s genetic information. B. They inherit double the chromosomes from one parent. C. They inherit identical genetic information from both parents. D. They receive half of their chromosomes from each parent through gametes. ____ 33. Which of the following is TRUE about asexual reproduction? A. two clones to produce offspring B. two parents to produce offspring C. only one parent to produce offspring D. a combination of parents to produce offspring ____ 34. Lito was observing an organism that reproduces by splitting into two identical copies. Which of the following is TRUE about the offspring? A. It will be identical to the parent. B. It will have mixed traits from both parents. C. It will receive genetic material from both parents. D. It will show more genetic diversity than the parent. ____ 35. If an animal reproduces sexually, what can we infer about its offspring in comparison to the parents? A. It will have a unique combination of traits from both parents. B. It will be genetically identical to one of the parents. C. It will have fewer chromosomes than the parents. D. It will only inherit traits from one parent. ____ 36. Mang Kardo wants to propagate his strawberry plant since they produce sweet fruits. To keep the genetic traits identical to all strawberry plants, which of the following techniques would be most effective? A. Pollinating it with another strawberry plant. B. Fertilizing it with seeds from a different plant. C. Allowing the plant to cross-pollinate with another species. D. Taking a runner (stem) from the original plant and planting it. ____ 37. Which of the following statement is TRUE about asexual and sexual reproduction? I. Asexual reproduction forms new individuals without involving sex cells II. Sexual reproduction forms new individuals using body parts. A. I is true while II is false C. Both I and II are correct statements B. I is false while II is true D. Neither I and II are correct statements  Republic of the Philippines Department of Education REGION III-CENTRAL LUZON SCHOOLS DIVISION OF CITY OF SAN FERNANDO ____ 38. A group of students were studying the types of reproduction among living things. Using secondary sources of information, they have searched the following examples: I. Hydra reproduces by budding II. Humans reproduce by fertilization III. Mushroom reproduced by spore formation IV. Flowering plants reproduces by pollination Which of the following is TRUE about their findings? A. Hydra and humans reproduce asexually. B. Mushroom and hydra reproduce sexually C. Humans and flowering plants reproduce sexually. D. Flowering plants and mushroom reproduce sexually. ____ 39. The table below provides information about organisms M, N, and O. Organism M Organism N Organism O Number of parents involved One parent Two parents One parent Similar to the parent(s) Similar Different Similar Which of the following can be inferred from the information in the table above? A. Organism N and O reproduce through asexual reproduction. B. Organism M and N reproduce through sexual reproduction. C. Only organism N reproduce through sexual reproduction. D. All organism reproduce through asexual reproduction For items 40 to 44, refer to the labelled diagram of the different levels of biological organization ____ 40. If multiple kinds of fish live together in a lake, which level of biological organization does this represent? A. biosphere C. ecosystem B. community D. population ____ 41. If a cell is damaged, which higher levels of biological organization could potentially be affected? A. tissues only C. tissues and organs B. organs only D. tissues, organs, and organ systems ____ 42. In the human body, muscles are made up of cells working together. This arrangement is an example of which level in the biological organization? A. organ C. organism B. organ system D. tissue ____ 43. In a forest, many kinds of plants and animals interact with the nonliving components like sunlight, water, soil, and air. Which of the following BEST represents this level? A. community C. organism B. ecosystem D. population ____ 44. As energy flows up the food pyramid, what happens to the amount of available energy at each trophic level? A. It doubles. C. It decreases. B. It increases. D. It stays the same.  Republic of the Philippines Department of Education REGION III-CENTRAL LUZON SCHOOLS DIVISION OF CITY OF SAN FERNANDO ____ 45. In a food pyramid, why are there generally fewer organisms at higher trophic levels than at lower ones?? A. The energy available decreases at each level, supporting fewer organisms. B. Organisms at higher levels cannot survive in large numbers. C. Lower-level organisms cannot reproduce quickly enough. D. Higher-level organisms need less food and energy. ____ 46. Why are grass and shrubs considered producers? A. They can be eaten by animals. B. They provide vegetables for animals and humans. C. They produce root crops that supply carbohydrates to animals. D. They convert energy from the sun into chemical energy in the form of glucose. For items 47 to 50, refer to the food pyramid below ____ 47. Which organism has the highest amount of energy? A. eagle B. frog C. grass D. snake ____ 48. Which trophic level is occupied by snake? A. primary consumer B. producers C. secondary consumer D. tertiary consumer ____ 49. Which of the following describes the flow of energy from the snake to the eagle? A. The eagle will receive the least energy. B. The snake has the least energy received. C. The snake will have 100% of the energy. D. The eagle will receive 100% of the energy. ____ 50. Only 10% of the energy is transferred to the next trophic level in the food pyramid. If for instance the grasshopper received 10,000 joules of energy from the grass, how much energy will be received by the eagle? A. 1 joule B. 10 joules C. 100 joules D. 1000 joules