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UNIT 10 THE ECOSYSTEM GRADE 11 TEST 1 Read the following advertisement and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 1 to 6. Your Place in Earth's Perfect Balance  Silently yet powerfully, nature orchestrates life's endless dance, while gracefully and mysteriously, the seasons paint their eternal masterpiece. Ancient forest wisdom guides our path, while (1)_________ carve their story and gentle ocean whispers share their secrets. The resources preserved by Earth sustain all living beings, while the energy captured by plants powers life's grand cycle, and the balance (2)_________ by ecosystems ensures our future. Our actions bring consequences to the ecosystem, while nature sends messages (3)_________ humanity, and the wind carries hope to distant lands. When Mother Earth (4)_________ all her ducks in a row, our ecosystem stands strong, but treat it like a house of cards and we'll be skating on thin ice—that's why going against (5)_________ is always barking up the wrong tree. (6)_________ in harmony with nature ensures our survival, while protecting our environment becomes our sacred duty, and learning to coexist remains our greatest challenge. Question 1:A. streams precious mountain B. mountain streams precious C. precious mountain streams D. streams mountain precious Question 2:A. which maintained B. maintaining C. was maintained D. maintained Question 3:A. for B. to C. at D. with Question 4:A. gets B. brings C. takes D. hands Question 5:A. natural B. nature C. naturally D. natureness Question 6:A. To living B. Live C. Living D. To live Read of the following leaflet and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 7 to 12. Your Guide to Earth's Living Connections  Welcome to a world where every creature, plant, and microorganism is connected in ways both visible and invisible!  While some animals prefer solitude, others thrive in complex social networks, creating fascinating communities in the wild. Trees (7)_________ fungi to branch out their nutrient-sharing networks beneath the forest floor. The biodiversity (8)_________ serve as nature's laboratories of evolution. (9)_________ nature's laws, every species plays a vital role in maintaining ecosystem balance. The symbiosis between different organisms creates an intricate web of life. A (10)_________ of species depend on each other in this delicate dance of survival.  In the rainforest canopy, (11)_________ network flourishes as pollinators connect countless flowering plants. The ecosystem carries on with its complex interactions, where predators check up on prey populations.
 From the tiniest (12)_________ to the mightiest redwoods, the interconnectedness of life shapes our planet's future.  Join us in discovering these amazing connections that make Earth a living, breathing superorganism! Question 7:A. team up with B. branch off with C. break down with D. grow out with Question 8:A. corridors B. hotspots C. sanctuaries D. reserves Question 9:A. In spite of B. In view of C. With regard to D. In accordance with Question 10:A. variety B. handful C. multitude D. bunch Question 11:A. the others B. other C. another D. others Question 12:A. insects B. seedlings C. bacteria D. microorganisms Mark the letter A, B, C or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions from 13 to 17. Question 13: a. Maya: No, please feel free to sit. I'm just finishing my coffee. b. Alex: Excuse me, is this seat taken? c. Alex: Thanks! That's an interesting coffee mug you have there. A. a-c-b B. c-b-a D. a-b-c D. b-a-c Question 14: a. Mrs. Reed: I meant musical scales... b. Mrs. Reed: Yes, welcome! Before we start, do you have any experience with scales? c. Tom: Oh yes, I used to have a pet lizard! d. Tom: Hi, I'm here for my first piano lesson. Are you Mrs. Reed? e. Tom: Oh! No, not really. A. d-b-c-a-e B. a-b-c-d-e C. d-c-e-b-a D. c-e-b-a-d Question 15: Dear Professor Chen, a. Just last week, our team discovered an extraordinary network of mycorrhizal fungi connecting over twenty different tree species across our study site. It's remarkable how these invisible threads facilitate nutrient exchange and communication between plants that appear isolated above ground. b. The way these microorganisms maintain the delicate balance of our ecosystem reminds me of your favorite saying: "Nature's smallest engineers build the strongest foundations." c. I would be honored if you could review our preliminary findings. Your expertise in microbial ecology would be invaluable as we prepare our paper for publication. d. I hope this letter finds you well. I'm writing to share some fascinating discoveries from my research on soil microbiomes here in the Amazon rainforest. Your lectures on ecosystem interconnectedness have taken on new meaning as I observe the intricate ways these microscopic life forms weave through our forest systems. e. The implications for ecosystem conservation are more significant than we initially anticipated.
Best regards, LK A. a-b-c-d-e B. d-a-b-c-e C. b-a-d-c-e D. c-d-e-a-b Question 16: a. However, habitat loss, pollution, and climate change threaten this natural harmony. As species disappear, the symphony loses vital instruments, weakening ecosystem stability. b. In nature's grand symphony, biodiversity conducts an intricate dance of life, where each species plays a vital role in maintaining ecological harmony. Like musicians in an orchestra, plants, animals, and microorganisms work in perfect coordination. c. We must act as stewards of this biological orchestra, protecting and preserving biodiversity. Our survival depends on maintaining nature's carefully composed symphony of life. d. This delicate balance enables essential processes like pollination, seed dispersal, and nutrient cycling to flourish. When species interact, they create resilient ecosystems that can better withstand environmental challenges. e. Healthy biodiversity provides crucial services - from clean water and air to food security and medicine. These interconnected systems support all life on Earth, including humans. A. d-e-b-a-c B. e-d-a-b-c C. b-d-e-a-c D. a-b-e-d-c Question 17: a. Within the earth, ancient seed banks lie dormant, waiting for optimal conditions. Tree rings and sediment layers chronicle historical climate patterns and environmental changes. b. This biological memory enables ecosystems to respond to environmental changes, drawing upon stored knowledge to maintain resilience through challenging times. c. Ecosystems function as living time capsules, storing centuries of environmental information in their soil, seeds, and species. Each element preserves crucial data about past conditions and adaptations. d. Understanding these natural archives is crucial as we face climate change. Nature's time capsule holds valuable lessons for survival and adaptation. e. Species carry genetic memories of past challenges, their DNA evolving through generations. These adaptations reflect successful survival strategies refined over millennia. A. c-a-e-b-d B. c-d-e-a-b C. c-e-b-a-d D. c-b-a-d-e Read the following passage about The Intricate Harmony of Natural Systems and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 18 to 22. In the grand tapestry of nature, countless systems work in perfect synchronization, creating a masterpiece of biological harmony. The delicate dance of pollination, (18)_________, demonstrates nature's brilliant efficiency in maintaining plant populations. The Amazon rainforest, which serves as Earth's vital respiratory system, continuously cycles carbon dioxide into oxygen through its dense canopy of vegetation. Had this crucial ecosystem been destroyed, (19)_________. Microscopic fungi in the soil decompose