SECOND PERIODICAL TEST IN SCIENCE 7 NAME: ____________________________ GR.& SEC._________ SCORE:________ DIRECTIONS: Read each item carefully and write the letter of the correct answer on the blank provided before each item. Write the letter corresponding to your chosen answer in CAPITAL. __________1. What tool is used to help you see tiny objects and living organisms? A. GogglesB. MicroscopeC. StethoscopeD. Telescope __________2. Who invented the first compound microscope? A. Isaac Newton B. Robert Hooke C. Alexander Graham Bell D. Hans & Zacharias Janssen __________3. Which two parts of the light microscope magnify the image of an object? A. Eyepiece & mirror B. Eyepiece & objective C. Objectives & mirror D. Objectives & diaphragm __________4. This is turned to bring the object being viewed closer. A. cover slipC. objective lens B. eyepiece lensD. fine adjustment __________5. The lens that is within the eyepiece of the light microscope is called the ____. A. ocularC. low power B. scanningD. high power __________6. When using the high-power objective, you should not adjust the ________. A. diaphragmC. fine adjustment B. stage clipsD. coarse adjustment __________7. The scanning, low, and high-power objectives are mounted on the______. A. stageC. body tube B. eyepieceD. revolving nosepiece __________8. The heart pumps blood throughout the body. To which organ system does heart belongs? A. Circulatory SystemC. Excretory System B. Digestive SystemD. Nervous System __________9. Oxygen is an important gas for organisms. Which organ system is oxygen processed? A. Excretory SystemC. Circulatory System B. Digestive SystemD. Respiratory System __________10. Which of the following parts of plants are used for reproduction? A. FlowersC. Roots B. LeavesD. Stem __________11. Which is NOT a part of the digestive system? A. EsophagusC. Kidney B. IntestinesD. Mouth __________12. Which of the following is NOT an organ of plants? A. HeartC. Leaves B. StemD. Flowers __________13. Which of the following organs is used for the transport of nutrients in plants? A. ArteryC. Kidney B. HeartD. Stem __________14. What plant part is responsible in transporting organic materials? A. RootsC. Leaves B. StemD. Flowers __________15. Which gas is released by humans during respiration? A. Carbon NitrideC. Carbon Trioxide B. Carbon DioxideD. Carbon Monoxide __________16. Which of the following does NOT belong to the sequence of the level of biological organization in an organism? A. CellC. Tissue B. OrganD. biosphere __________17. From the following statements below, how will you consider yourself as an organism? I. My body is composed of different sets of organs. II. My body is composed of cells which organs are made. III. My body is composed of complete sets of organ systems. A. I and II onlyC. II and III only B. I and III onlyD. I, II and III only __________18. Which of the following is not a level of biological organization? A. organismC. cells B. PopulationD. Abiotic __________19. What is a cell? A. A cell is small organ in the body. B. A cell is a kind of micro-organism that infects the host’s body. C. A cell is a microscopic organism that inhabits another organism’s body. D. A cell is the smallest unit of an organism’s body that is capable of performing life function. __________20. Which major part of a cell is composed of jelly-like substance of mainly water as well as substances like dissolved nutrients? A. NucleusC. Cytoplasm B. NucleolusD. Cell membrane __________21. What is the function of the cell’s nucleus? A. It is the site for protein synthesis. B. It keeps all the parts of the cell inside and act as a boundary. C. It is the place within the cell where all cellular activities happen. D. It controls and regulates all cell activities and it contains the cell's DNA. __________22. How does the cell membrane of an animal cell works? A. It holds the organelles in place. B. It contains water and food for cell. C. It directs the activity of the cell – for example, when it grows and divides. D. It controls what enters and exits the cell such as water, nutrients and waste and thereby protects and supports the cell. __________23. Which organelle is responsible for the transport of undigested material to cell membrane for removal? A. CentrioleC. Lysosome B. ChromosomeD. Peroxisome __________24. Mitochondria is one of the important organelles in an animal cell and is essential for vital cellular activities to happen. Why does the mitochondria known as the “powerhouse” of the cell? A. It has a flagellum. B. It has double membrane structure. C. It is one of the major organelles in the cell. D. It produces energy through chemical reactions. __________25. What organelle is made up of RNA and functions for protein synthesis? A. LysosomeC. Golgi Apparatus B. RibosomeD. Endoplasmic Reticulum __________26. In your homes there is a need to ensure that the food supplies are well-kept, stored and labelled for easy access and usage and to avoid spoilage. In an animal cell there is also an organelle that functions the same way like your refrigerator at home. Why is the Golgi apparatus similar to the refrigerator you have at home? A. It moves materials around the cell. B. It clean up the cell’s waste products. C. It breaks down food and release energy for the cell. D. It packages, stores, and secretes energy for the cell. __________27. Which organelle is responsible for the movement of materials, substances and nutrients around and serves as the canal of the cell? A. Endoplasmic ReticulumC. Peroxisome B. NucleolusD. Vesicle __________28. The protoplasm is composed of inorganic and organic compounds like carbohydrates, proteins, lipids and nucleic acids. Where is the protoplasm located inside the cell? A. Cell MembraneC. Nucleus B. CytoplasmD. Organelle __________29. To ensure that our homes are free from pathogens we make sure to use disinfectants. The animal cell has also an organelle that serves like a disinfectant to ensure that cells are healthy and can proceed with growth and reproduction. Why are lysosomes called as the “Lysol’s” of the cell? A. They digest fatty acids and ethanol. B. They clean up cells wastes products. C. They are involved and active during cell division. D. They carry food materials into the cell and wastes out products out. __________30. Is it TRUE that nucleus is the brain of the cell? A. Yes, because it leads the entire activity of the cell B. No, because it is the mitochondrion who make it. C. No, because it is the cell wall who controls the cell. D. Yes, because it commands on the entire activity of the cell. __________31. Ribosomes can be free or attached. What type of endoplasmic reticulum has attached ribosomes? A. Long Endoplasmic Reticulum B. Short Endoplasmic Reticulum C. Rough Endoplasmic Reticulum D. Smooth Endoplasmic Reticulum __________32. How is cell wall compared to a perimeter fence? A. It guards the activity of the cell. B. It protects the entire part of the cell. C. It helps the cell to check what goes in and goes out. D. It defends the entire cell from any foreign bodies that will invade the entire parts. __________33. Why is DNA called to be the blueprint of an organism? A. It contains direction that leads an organism. B. It contains signals for normal functioning of an organism. C. It contains instructions for traits and characteristics of an organism. D. It contains nutrients and substances for the development of an organism. __________34. What is a cell? A. A numberC. An imagination B. An animalD. A microscopic structure __________35. When was the cell first discovered? A. 1655C. 1675 B. 1665D. 1685 __________6. Who was the Biologist who discovered the cell? A. Anton Van Leeuwenhoek B. Theodore Schwann C. Matthias Schleiden D. Robert Hooke __________37. Who among the following scientists below is NOT a proponent of the cell theory? A. Matthias Schleiden B. Theodore Schwann C. Rudolph Virchow D. Robert Hooke __________38. Which of the following comprises a greater portion in a cell? A. DNAC. Water B. RNAD. Protein __________39. Cells are considered as structural and functional unit of life. Do plants and animals have the same type cell? A. Yes, human and animals have the same type of cells. B. No, human and animals cells are different in terms of shape. C. Yes, all organisms are composed of cells, thus they have the same type too. D. No, human and animals cells are different in shape, size, structures and functions. __________40. What part of the flower is the most attractive where it uses to attract insects? A. OvaryC.Sepals B. PetalsD. Style __________41. What do you call to the part of the flower that supports or holds the anther up? A. FilamentC.Stamen B.PollenD. Style __________42. Which of the following parts of the flower refers to the sex cells produced by the ovary? A. AntherC.Style B. OvulesD.Pollen grains __________43. Which of the following does NOT belong to the group?? A. FilamentC. Stigma B. OvaryD. Style __________44. In what organ of the plant does the reproduction occurs? A. FlowerC. Roots B. LeafD. Stem __________45. Which of the following organisms uses pollination as its mode of sexual reproduction? A. FrogC. Spyrogyra B. RabbitD. Gumamela flower __________46. Which of the following refers to the male reproductive part of a flower? A. PetalC. Sepal B. PistilD. Stamen __________47. Which species can produce offspring that are genetically different from their parents? A. A species that has few variations B. A species that reproduces sexually C. A species that reproduces asexually D. A species that competes with a similar species __________48. In what part of the flower are the pollen grains produced? A. AntherC. Ovary B. FilamentD. Stigma __________49.Which of the following statement/s differentiate/s asexual from sexual reproduction? I. In sexual reproduction, two parent cells are needed to produce new individual. II. In asexual reproduction, only one parent cell is needed to produce new individual. III. In sexual reproduction, only one parent cell involved, while in asexual reproduction, two parent cells are involved. A. I and IIC. I and III B. II and IIID. III only __________50.Alexander plants a group of seeds that all came from the same plants. When seeds grow and bloom, the resulting flowers are different sizes and colors. What can Alexander conclude from his experiment? A. Alexander used soil that had other seeds in it. B. The species of plants must reproduce sexually. C. The species of plants must reproduce asexually. D. The flowers changed colors because of its environment. __________51. Flowers are the reproductive organs of plants. How will you differentiate flowers from the reproductive organs of animals? A. Flowers need pollinators like bees to reproduce; animals do not. B. Flowers are shed from time to time; nothing is shed from animal C. Flowers have male and female parts; animals have either male or female parts. D. There is no difference between flowers and the reproductive organs of animals. __________52. Jhen was asked by her science teacher to give an example of an organism that can reproduce sexually. She answered yeast. Is Jhen correct about her answer? A. No, because yeast needs one parent cell to reproduce. B. Yes, because yeast needs one parent cell to reproduce. C. No, because yeast needs two parent cells to reproduce. D. Yes, because yeast needs two parent cells to reproduce. __________53.A sperm cell unites with an egg cell to form a zygote. Which process is taking place? A. Asexual reproductionC. Pollination B. FertilizationD. Vegetative propagation __________54. How would you compare sexual reproduction and asexual reproduction? Asexual reproduction has many forms while sexual reproduction has onlytwo. Sexual reproduction produces offspring that are identical to the parent while asexual reproduction produces offspring that are not identical to the parent. Asexual reproduction happens only in plants while sexual reproduction happens only in humans. Sexual reproduction requires two parent cells to form an offspring while asexual reproduction needs only one parent cell to produce offspring. __________55. A plant needs water, radiant energy, minerals, oxygen, and carbon dioxide to live. How are these requirements needed by plants categorized? A. ClimateC. Biotic components B. MineralsD. Abiotic components __________56. Which of the following represents an abiotic component of the environment? A. Flowing lavaC. Sprouting mongo seeds B. Cat nursing its youngD. Growing grasses on mountain __________57. Which of the following are needed in setting up an aquarium as a mini ecosystem? A. A number of fish and water only B. Combination of water, sand, soil and light C. Population of fish, snails, and plants only D. Communities of different species of organisms, water, sand, soil, and sunlight __________58. On which abiotic factors would varieties of fish and seaweeds rely for their survival? A. Insects and sun B. Water and corals C. Water and temperature D. Solid particles and temperature __________59. Which of the following is an abiotic factor produced by plants? A. Flower B. Fruit C. Oxygen D. Stem __________60. Which ecosystems below would you find the highest rate of photosynthesis? A. Aquarium which contained water, fish, and plants B. Fish pond which comprised of mud fish and water lily C. Forest surrounded by tall trees, ferns, shrubs and animals D. Lake comprises of different varieties of fish, alligators, and water cabbage
