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Questions and Answers
What is the overall equation for photosynthesis?
What is the overall equation for photosynthesis?
What is the primary function of excretion in living organisms?
What is the primary function of excretion in living organisms?
What type of respiration occurs in the presence of oxygen?
What type of respiration occurs in the presence of oxygen?
What is the primary function of transpiration in plants?
What is the primary function of transpiration in plants?
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What type of nutrition involves consuming other organisms for energy and nutrients?
What type of nutrition involves consuming other organisms for energy and nutrients?
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What factor affects the rate of photosynthesis?
What factor affects the rate of photosynthesis?
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Which organ is responsible for excreting waste and excess substances in the form of urine?
Which organ is responsible for excreting waste and excess substances in the form of urine?
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What is the byproduct of aerobic respiration that is released into the atmosphere?
What is the byproduct of aerobic respiration that is released into the atmosphere?
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What is the term for the process of water transport through plants from roots to leaves?
What is the term for the process of water transport through plants from roots to leaves?
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Which process supports the growth and development of plants?
Which process supports the growth and development of plants?
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Study Notes
Photosynthesis
- Definition: Process by which plants, algae, and some bacteria convert light energy into chemical energy
- Equation: 6CO2 + 6H2O + light energy → C6H12O6 (glucose) + 6O2
- Importance:
- Produces oxygen for atmosphere
- Provides energy for plant growth and development
- Supports food chain (herbivores, carnivores, etc.)
- Factors affecting photosynthesis:
- Light intensity
- Temperature
- Water availability
- CO2 concentration
Excretion
- Definition: Process by which living organisms remove waste and excess substances from the body
- Importance:
- Maintains homeostasis (balance of body fluids and chemicals)
- Prevents toxicity and poisoning
- Regulates pH and ion balance
- Types of excretion:
- Kidneys (urine)
- Lungs (CO2, water vapor)
- Skin (sweat)
- Liver (bile)
Respiration
- Definition: Process by which living organisms generate energy from the breakdown of glucose
- Equation: C6H12O6 (glucose) + 6O2 → 6CO2 + 6H2O + energy (ATP)
- Importance:
- Provides energy for cellular activities
- Supports growth and maintenance
- Essential for life
- Types of respiration:
- Aerobic (oxygen present)
- Anaerobic (oxygen absent)
Transpiration
- Definition: Process by which water is transported through plants from roots to leaves and released as water vapor
- Importance:
- Helps regulate plant temperature
- Supports photosynthesis
- Maintains turgor pressure (plant rigidity)
- Factors affecting transpiration:
- Temperature
- Humidity
- Light intensity
- Wind speed
Nutrition
- Definition: Process by which living organisms obtain and utilize nutrients for energy, growth, and maintenance
- Types of nutrition:
- Autotrophic (self-nourishing, e.g., photosynthesis)
- Heterotrophic (other-nourishing, e.g., consuming other organisms)
- Importance:
- Supports growth and development
- Maintains health and well-being
- Essential for life
Photosynthesis
- Converts light energy into chemical energy through 6CO2 + 6H2O + light energy → C6H12O6 (glucose) + 6O2
- Produces oxygen for atmosphere and energy for plant growth and development
- Supports food chain, providing energy for herbivores, carnivores, and others
- Light intensity, temperature, water availability, and CO2 concentration affect photosynthesis
Excretion
- Removes waste and excess substances from the body to maintain homeostasis
- Prevents toxicity and poisoning by regulating pH and ion balance
- Occurs through kidneys (urine), lungs (CO2, water vapor), skin (sweat), and liver (bile)
Respiration
- Generates energy from glucose breakdown through C6H12O6 (glucose) + 6O2 → 6CO2 + 6H2O + energy (ATP)
- Provides energy for cellular activities, growth, and maintenance
- Essential for life, with aerobic (oxygen present) and anaerobic (oxygen absent) types
Transpiration
- Transports water through plants from roots to leaves and releases as water vapor
- Helps regulate plant temperature, supports photosynthesis, and maintains turgor pressure
- Affected by temperature, humidity, light intensity, and wind speed
Nutrition
- Obtains and utilizes nutrients for energy, growth, and maintenance
- Autotrophic (self-nourishing, e.g., photosynthesis) and heterotrophic (other-nourishing, e.g., consuming other organisms) types
- Supports growth, development, health, and well-being, and is essential for life
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Description
Understand the process of photosynthesis, its importance, and factors affecting it, as well as the definition of excretion in biology.
