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READING PASSAGE 1

READING PASSAGE 1

The Secret Life of Forests

Trees in a forest are often regarded as solitary individuals competing fiercely for sunlight, soil moisture, and essential nutrients. However, recent breakthroughs in forestry and plant biology have revealed that undisturbed woodland functions as a highly cooperative super-organism. At the heart of this collaborative network is the mycorrhizal fungal system, commonly described by researchers as the 'Wood Wide Web'.

Through microscopic fungal filaments known as hyphae, tree root systems are interconnected across vast distances. When an individual tree absorbs sunlight and synthesises sugars through photosynthesis, it allocates a significant proportion of its carbon output to its fungal partners. In return, the fungal network mobilises vital minerals such as phosphorus and nitrogen from the surrounding bedrock and channels them directly back into the tree. Furthermore, when mature trees detect an impending insect infestation, they transmit chemical warning signals through the fungal network, allowing younger saplings miles away to ramp up their defensive enzymes before pests arrive.

Dr. Suzanne Simard from the University of British Columbia demonstrated that oldest 'mother trees' act as central ecological hubs. When mother trees are logged or removed, the structural integrity of the entire woodland communication matrix is critically impaired, causing sudden drops in the survival rates of neighbouring seedlings.

Questions for Passage 1 (READING PASSAGE 1)

Read the text and answer the questions below.

1
The mycorrhizal fungal network only connects trees of the exact same species.
2
Trees provide carbon-based sugars to fungal networks in exchange for essential soil minerals.
3
Dr. Suzanne Simard believes that removing mother trees has negligible impact on surrounding seedlings.
4
Trees send chemical warning signals through the fungal network to alert other trees of approaching infestation.
READING PASSAGE 2

READING PASSAGE 2

Sustainable Architecture in Rapidly Growing Megacities

The relentless expansion of urban populations across the globe has exerted immense pressure on traditional construction paradigms. Concrete and steel manufacturing accounts for nearly fifteen percent of annual greenhouse gas emissions worldwide. In response, contemporary architectural pioneers are reviving biophilic design principles coupled with cross-laminated timber (CLT) to construct carbon-negative skyscrapers.

Biophilic design integrates natural elements—such as vertical sky gardens, natural cross-ventilation shafts, and daylight harvesting—directly into the structural envelope of commercial and residential high-rises. In Singapore, buildings such as the CapitaSpring tower incorporate over 80,000 plants across multiple levels, lowering ambient indoor temperatures by up to four degrees Celsius without active air conditioning.

Meanwhile, cross-laminated timber engineered from sustainably harvested Nordic pine provides equal tensile strength to reinforced concrete while sequestering tons of carbon within the structural beams themselves. Contrary to widespread safety concerns, thick CLT beams perform remarkably well in fire trials, forming an insulating protective char layer that prevents rapid structural collapse.

Questions for Passage 2 (READING PASSAGE 2)

Read the text and answer the questions below.

5
According to Passage 2, why is concrete and steel construction considered environmentally problematic?
6
How do engineered cross-laminated timber (CLT) beams maintain structural integrity during fires?
7
In Singapore, the CapitaSpring tower uses over 80,000 plants to lower indoor temperatures by up to degrees Celsius.
READING PASSAGE 3

READING PASSAGE 3

Artificial Intelligence and the Future of Medical Diagnostics

The integration of deep learning algorithms into diagnostic medicine represents one of the most transformative shifts in healthcare history. Historically, radiologists and pathologists relied exclusively on subjective human examination of magnetic resonance imaging (MRI) scans and histological biopsy slides. Today, state-of-the-art computer vision models trained on hundreds of thousands of annotated scans can identify micro-calcifications indicative of early-stage breast cancer with accuracy exceeding ninety-five percent.

However, leading bioethicists caution against premature full automation. A persistent barrier is the 'black box' problem: deep neural networks operate through multilayered non-linear mathematical abstractions, meaning that even their creators cannot fully trace the exact logical trajectory that led to a specific diagnostic output. In critical surgical or oncology decisions, clinicians require clear explainability rather than blind trust in algorithmic predictions.

Consequently, international regulatory bodies such as the European Medicines Agency are now mandating 'human-in-the-loop' frameworks. Under these standards, artificial intelligence is strictly positioned as a diagnostic assistant that flags suspect abnormalities for human physicians to verify, ensuring legal accountability and ethical reassurance.

Questions for Passage 3 (READING PASSAGE 3)

Read the text and answer the questions below.

8
What is identified as the primary barrier preventing full diagnostic automation by AI in critical medicine?
9
European regulatory guidelines permit artificial intelligence models to perform cancer diagnoses completely autonomously.
10
Regulatory agencies mandate a 'human-in-the-loop' framework to guarantee legal and ethical reassurance.