1. What is the study of the interaction of living things with one another and with its environment? A. community D. population B. ecology C. ecosystem 2. How is this organization classified if there are different species of animals and plants living together in the same environment? A. association B. ecology C. community D. population 3. Which of the following statements are true about changes in the size of population? 1. __Birth increases the population II. Death decreases the population III. Birth decreases the population IV. Death increases the population A. I and II B. I and IV C. II and III D. II and IV 4. Why did the twelve small fishes in an aquarium which contains three gallons of water died even if you fed them with the right amount of food? A. The smelly and cloudy water in the aquarium was not replaced. B. The aquarium did not have enough temperature range. C. There was not enough space for the number of fishes. D. The aquarium was moved to another place. 5. Which of the following can help conserve our ecosystem? A. Construct buildings near the river banks. B. Improve the ecosystem by inviting tourists to visit your place. C. Protect the forests and bodies of water against harmful activities. D. Encourage the political leaders to build farm to market roads to reach all beautiful places What will happen if there are more predators than preys in the ecosystem? A. The source of food will increase B. The source of food will decrease. C. The source of foods will remain the same. D. Other animals will also decrease in number

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