Tiêu đề UNIT 10 THE ECOSYSTEM GRADE 11 TEST 1.docx ✅

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