Plant Physiology
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Brewster
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BIOLOGY
Plant Physiology
Drought Tolerance
Plants repair microscopic water blockages to survive drought stress
6 hours ago
0
Which factor most directly influences a plant's ability to maintain growth during drought conditions?
The plant's mechanisms for repairing xylem embolism and managing cellular stress
The plant's ability to grow faster during drought periods
The plant's capacity to survive by completely halting growth during drought
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SteveO1
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BIOLOGY
Plant Physiology
Photosynthesis
Sunlight powers a hidden factory that sustains Earth's oxygen and energy supply
22 hours ago
0
What is the primary trade-off plants face during photosynthesis that impacts their survival?
Exposure to sunlight is necessary for energy capture but can cause damage to plant tissues.
Plants produce oxygen by absorbing carbon dioxide without any energy input.
Photosynthesis occurs only at night when plants conserve energy.
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Nellieger
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BOTANY
Plant Physiology
Winter-Flowering Shrubs
Winter blooms reveal nature’s battle between survival and beauty in the coldest months
34 hours ago
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What is a key trade-off for winter-flowering shrubs blooming during cold months?
They expend more energy to maintain flowers in harsh conditions, risking frost damage.
They produce larger flowers than summer plants to attract more pollinators.
They bloom in winter because pollinators are more abundant then.
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JOHN_BASH
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BIOLOGY
Plant Physiology
Photosynthesis
Sunlight’s secret alchemy sustains Earth's oxygen and life in a delicate balance
5 days ago
0
What is the primary consequence of photosynthesis on Earth's atmosphere and life?
It produces oxygen and organic compounds that sustain most life forms.
It consumes oxygen and releases carbon dioxide, reducing atmospheric oxygen.
It only benefits plants and has no impact on other organisms.
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Bonbo
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BIOLOGY
Plant Physiology
Transpiration
Plants balance water loss and nutrient uptake through tiny leaf pores in a life-saving trade-off
8 days ago
0
How does stomatal closure during transpiration affect a plant's metabolic processes?
It increases water uptake and accelerates photosynthesis.
It reduces water loss but also limits CO2 absorption, slowing photosynthesis and growth.
It has no effect on nutrient uptake or photosynthesis.
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Bb115
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BIOLOGY
Plant Physiology
Root Nodules
A microscopic alliance in root nodules transforms barren soil into fertile ground
10 days ago
0
What is the primary trade-off for legumes forming root nodules with rhizobia bacteria?
Rhizobia bacteria consume all the plant's nutrients without benefit
Root nodules form only when soil nitrogen is abundant
Energy and resources spent maintaining nodules versus gaining nitrogen in poor soils
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BIOLOGY
Plant Physiology
Photosynthesis
The rise of photosynthesis turned Earth’s atmosphere from toxic to life-sustaining
11 days ago
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How did the evolution of oxygenic photosynthesis impact Earth's atmosphere and life?
It introduced oxygen into the atmosphere, enabling aerobic life to evolve.
It decreased atmospheric oxygen, limiting the development of complex life.
It produced carbon dioxide as a byproduct, which was toxic to early life.
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JOHN_BASH
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BIOLOGY
Plant Physiology
Drought Tolerance Traits
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Root fungi partnerships accelerate plant adaptation to drought stress
12 days ago
Plants that survive drought do so through a remarkable arsenal of traits that keep them thriving when water is scarce. Drought tolerance is not just about surviving dry spells; it's about maintaining growth and biomass...
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Nellieger
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BIOLOGY
Plant Physiology
Photosynthesis
The rise of oxygen from photosynthesis reshaped Earth's atmosphere and life forever
13 days ago
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How did the evolution of oxygenic photosynthesis impact Earth's atmosphere and life?
It increased atmospheric oxygen, enabling aerobic life and ozone formation.
It decreased oxygen levels, causing most life to become anaerobic.
It had no significant effect on atmospheric gases or life evolution.
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Steeeve
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BIOLOGY
Plant Physiology
Xylem
Xylem's invisible water highways defy gravity to sustain towering trees and tiny plants alike
13 days ago
0
What is the primary mechanism by which xylem transports water upward in plants?
Active pumping by living cells in the xylem
Transpiration pull creating negative pressure
Gravity pulling water down through the xylem
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BIOLOGY
Plant Physiology
Photosynthesis
Sunlight-driven oxygen production shaped Earth's atmosphere and life evolution
10 Feb 2026
0
How does photosynthesis contribute to Earth's atmosphere and life support?
By consuming oxygen and producing carbon dioxide during energy storage
By converting sunlight into chemical energy and releasing oxygen through water splitting
By generating energy without involving water or oxygen release
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BIOLOGY
Plant Physiology
Deep Root Systems
Deep root systems enable plants to survive droughts by accessing underground water reserves
5 Feb 2026
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What is the primary advantage of deep root systems for plants in desert environments?
They access underground water reserves unavailable to shallow-rooted plants.
They allow plants to photosynthesize more efficiently in low light.
They enable plants to absorb nutrients directly from the air.
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Brewster
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BIOLOGY
Plant Physiology
Nectaries
Nectaries serve dual roles: attracting pollinators and recruiting bodyguards for plants
5 Feb 2026
0
What is the primary difference between floral and extrafloral nectaries in plants?
Both floral and extrafloral nectaries primarily function to attract pollinators for reproduction.
Extrafloral nectaries produce nectar only to attract herbivores for feeding.
Floral nectaries attract pollinators to aid reproduction, while extrafloral nectaries attract protective animals to defend the plant.
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Bonbo
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BIOLOGY
Plant Physiology
Chlorophyll
Chlorophyll's green pigment is key to converting sunlight into life-sustaining energy in plants
3 Feb 2026
0
What is the primary role of chlorophyll in plants during photosynthesis?
To produce oxygen directly from carbon dioxide
To reflect blue and red light to protect the plant
To absorb light energy and convert it into chemical energy
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Steeeve
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BIOLOGY
Plant Physiology
Photosynthesis
Photosynthesis sustains Earth's oxygen and fuels life by converting sunlight into chemical energy
31 Jan 2026
0
What is the primary role of oxygenic photosynthesis in Earth's atmosphere?
It produces oxygen as a byproduct, maintaining atmospheric oxygen levels.
It consumes oxygen to produce carbon dioxide for plants.
It releases carbon dioxide as a waste product during energy conversion.
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Bonbo
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BIOLOGY
Plant Physiology
Photosynthesis
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Photosynthesis powers life by converting sunlight into chemical energy and oxygen on Earth
30 Jan 2026
Photosynthesis powers life by converting sunlight into chemical energy and oxygen on Earth Photosynthesis is a vital biological process carried out by photopigment-bearing autotrophic organisms such as plants, algae, and cyanobacteria. These organisms convert light...
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Brewster
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BIOLOGY
Plant Physiology
Photosynthesis
Photosynthesis powers life by converting sunlight into chemical energy and oxygen
30 Jan 2026
0
What is the primary role of water in oxygenic photosynthesis?
It acts as the main source of carbon for carbohydrate synthesis
It is split to release oxygen and provide electrons for the process
It absorbs sunlight to initiate the photosynthesis process
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112112112John
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BIOLOGY
Plant Physiology
Xylem
Xylem tissue, derived from ancient Greek meaning wood, is vital for water transport in plants
29 Jan 2026
0
What structural feature of xylem cells allows efficient upward water transport in vascular plants?
Thick-walled cells that store water internally
Cells with numerous chloroplasts to facilitate photosynthesis
Hollow, tube-like cells such as tracheids and vessel elements
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