21. What is the highest level of biological organization that composed of atmosphere, hydrosphere, lithosphere and ecosphere that sustains life of the entire Earth? A. Biosphere B. Cell C. Organ D. Organ System
22. The interaction between the living things and non-living components happens here: A. Biome B. Community C. Ecosystem D. Population
23. Group of organisms of the same species living together in a certain interacting with one another, is considered as: A. Biome B. Community C. Ecosystem D. Population
24. Newborn baby has approximately 100 billion neurons which is almost all the neurons they will ever have during their lifetime. As the child grows the neuron becomes bigger and branch out its dendrites to build communication. What function of cell is implied here? A. Assimilation B. Growth and Development C. Nutrition D. Reproduction
25. What structure in the cell generates energy and site for photosynthesis in plants? A. Mitochondria and chloroplast B. Vacuole and Plastid C. Ribosomes and Endoplasmic Reticulum D. Nucleus and Centrosomes
26. Bacteria are classified based on its________. A. Shape B. Size C. Use D. Reproduction
27. What is Penicillin (medicine) made from? A. algae B. mold C. sugar D. water
28.Which of the following statement about food-getting in protozoans is incorrect? A. Paramecium uses its cilia B. Amoeba uses its false feet C. Euglena uses its flagellum D. Slime molds uses its hand
29. Due to covid19 outbreak caused by a virus, everyone is advised to use a facemask. When should face masks be worn? A. in a confined or crowded space B. on a public transport C. in a small shop D. all of the above
30. Organisms like bacteria, fungi, worms, and insects recycle the nutrients back to the soil. These organisms are referred to what component of ecosystem? A. Biotic component B. Abiotic Component C. Climatic Component D. Soil Component
31. Ecosystem is community that is made up of plants, animals, soil, sunlight and nutrients interacting as one system? What are these components called? A. Community and Individual B. Habitat and animals C. Biotic and Abiotic D. Population and Species.
32. In a predator-prey relationship, which organism is harmed or killed? A. Predator B. Prey C. Both predator and prey D. Neither predator nor prey
33. Symbiosis is an interaction that exists in a close relationship in which one or both organisms obtain a benefit. A. Mutualism B. Parasitism C. Commensalism D. All of the above
34. What are greenhouse gases? A. Gases that keep the atmosphere cool. B. Gases that harm the Earth. C. Gases that trap the energy in the atmosphere. D. Gases that we breathe.
35. As a student what can you do slow down global warming? A. Use transportation that use gasoline rather than walking. B. Throw garbage anywhere I want. C. Join clean and green project and plant more trees. D. Eat a lot of processed food.
36. What will happen to the balance of nature if abiotic factors were change due to human activity? A. There will be enough food supply for animals and plants. B. The natural cycle of life will be distorted and may harm biotic factors. C. There will be a new cycle for the animals and environment. D. None of the above.
37. Garbage collected at home are dumped in a site. The waste management does not follow the proper guidelines in solid waste disposal. Eventually, this scenario may cause the ground water to be contaminated and may affect quality of drinking water. What abiotic factors is being affected on this situation? A. Soil B. Temperature C. Water D. Atmosphere
38. Which of the following statements is NOT TRUE about air pollution. A. Air pollution is a mixture of hazardous substances from human activity or natural sources. B. Air pollution cause danger in animals, plants, and natural cycle of the environment. C. Air pollution may affect the quality of air we breathe. D. Air pollution can add more gases that may help soil fertility and plants to grow.
