Interdependence among Living Organisms and the Environment
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1 Form 2 hapter 4 Interdependence among Living Organisms and the Environment Paper 1 nswer all questions. Each question is followed by four options,,, and. For each question, choose one answer only. 1. The population in the same habitat is a group of organism of the same species a group of organisms of different species a group of animals of the same species all the organisms and the non living things 2. The study of the relationship of the interdependence between organisms with the environment is known as ecosystem ecology habitat community 3. The energy from the Sun is changed to chemical energy by producer secondary consumer primary consumer decomposer 4. type of woodlice lives in a tree trunk. When the contents of the alimentary canals of the woodlice were analysed, it was found that they had fluid from the tree. Gradually the tree wilted. The woodlice can be classified as a predator host producer parasite 5. Which of the following shows a prey-predator relationship? heetah - lion Sea anemone - hermit crab Eagle - snake 1
2 Lice - human 6. Which of the following represents P, Q, R and S in the pyramid of numbers in the above figure? P Q R S Frog Leaf Snake aterpillar Leaf aterpillar Frog Snake Snake Frog aterpillar Leaf Leaf aterpillar Snake Frog 7. Which of the following is an example of commensalism? ird s nest fern and tree Sea anemone and hermit crab Rafflesia and a tree Tapeworm and human 8. The above figure shows a food chain in a grass field. What happens if the field is sprayed with an insecticide? The number of snakes increases The number of grasshoppers increases The number of birds increases The number of grass plants increases 9. type of bird can be found on the back of a buffalo. It eats the ticks found on the body of the buffalo. The relationship between the bird and the buffalo is known as parasitism mutualism 2
3 10. prey-predator competition The above figure represents a food web in a pond. How many food chains are there in the food web? Paddy plant The figure above shows a food web. The secondary consumers are eagle only bird only snake only bird and snake 12. Paddy plant Rat Snake Eagle The figure above shows a food chain. Which of the following are consumers? I Rat II Eagle III Snake I and II only I and III only II and III only 3
4 I, II and III 13. Which of the following shows a disadvantage of biological control? It pollutes the environment It increases the population of the predator It does not kill other animals except the pest It destroys the pest in a natural way 14. What are the substances needed in the process of photosynthesis? I Water II arbon dioxide III Heat I and II only I and III only II and III only I, II and III 15. n experiment is carried out and it is observed that the part that is exposed to sunlight becomes dark blue when tested with iodine solution. What is the conclusion of the experiment? Photosynthesis requires water Photosynthesis requires sunlight Photosynthesis requires carbon dioxide Photosynthesis requires chlorophyll 16. X Which of the following represents X in the pyramid of numbers in the figure above? Tertiary consumer Producer Secondary consumer Primary consumer 4
5 17. Which of the following processes releases oxygen? ombustion Respiration Photosynthesis ecay 18. Examples of biological control include the use of I fish to control the population of mosquito larva in a pond II owls to control the population of rats in oil palm plantation III birds to control the population of the grasshoppers in a fruit orchard I only I and II only II and III only I, II, and III 19. Which of the following are required in the process of photosynthesis? I Oxygen II hlorophyll III arbon dioxide I only I and II only II and III only I, II, and III 20. The gas released during combustion can cause global warming acid rain the decrease in ph value of soil the depletion of ozone layer 5
6 Paper 2 nswer the question. The above experiment is carried out to study the role of carbon dioxide in photosynthesis. oth plants are kept in the dark for two days before the experiment. (a) Why are the plants kept in the dark for two days before the experiment? (b) What is the function of potassium hydroxide solution? (c) State the variables involved in this experiment. Manipulated variable Responding variable onstant variable (d) State the hypothesis in this experiment. (e) Which plant will undergo photosynthesis? (f) ircle the others substances needed for the process of photosynthesis. hlorophyll Water Oxygen 6
7 nswers: Paper Paper 2 (a) To remove all the starch in the leaves (b) To absorb carbon dioxide (c) (i) The presence of carbon dioxide (ii) The presence of starch in the leaves (iii) Type of plants (d) Green plants require carbon dioxide to make starch / food (e) Plant (f) hlorophyll and water 7
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