Podcast
Questions and Answers
What percentage of the earth's surface is covered by water?
What percentage of the earth's surface is covered by water?
- Exactly 50%
- Less than 10%
- Over 71% (correct)
- Around 30%
Where is over 97% of the water in the biosphere located?
Where is over 97% of the water in the biosphere located?
- Underground aquifers
- Oceans (correct)
- Rivers and lakes
- Polar ice caps and glaciers
What percentage of water is freshwater in rivers and lakes?
What percentage of water is freshwater in rivers and lakes?
- Exactly 50%
- Less than 1% (correct)
- Around 10%
- Over 90%
What powers the hydrological cycle?
What powers the hydrological cycle?
What determines the availability of water to organisms in terrestrial and aquatic environments?
What determines the availability of water to organisms in terrestrial and aquatic environments?
How do terrestrial animals regulate internal water?
How do terrestrial animals regulate internal water?
What is a major cause of water loss for organisms on land?
What is a major cause of water loss for organisms on land?
How do marine bony fish make up for water loss?
How do marine bony fish make up for water loss?
What is the method of water acquisition for small terrestrial animals?
What is the method of water acquisition for small terrestrial animals?
What challenges do organisms in aquatic environments face related to water and salt balance?
What challenges do organisms in aquatic environments face related to water and salt balance?
Over 97% of the water in the biosphere is located in oceans.
Over 97% of the water in the biosphere is located in oceans.
Less than 1% of the earth's water is freshwater in rivers and lakes.
Less than 1% of the earth's water is freshwater in rivers and lakes.
The hydrological cycle is powered by geothermal energy.
The hydrological cycle is powered by geothermal energy.
The movement of water down concentration gradients does not determine the availability of water to organisms.
The movement of water down concentration gradients does not determine the availability of water to organisms.
The hydrological cycle involves the exchange of water among reservoirs.
The hydrological cycle involves the exchange of water among reservoirs.
Evaporation is a major cause of water loss for organisms in aquatic environments.
Evaporation is a major cause of water loss for organisms in aquatic environments.
Terrestrial plants gain water from the air through transpiration.
Terrestrial plants gain water from the air through transpiration.
Small terrestrial animals can absorb water from the air.
Small terrestrial animals can absorb water from the air.
Marine invertebrates and sharks have body fluids hyperosmotic to the surrounding seawater.
Marine invertebrates and sharks have body fluids hyperosmotic to the surrounding seawater.
Marine bony fish actively take in water through their gills.
Marine bony fish actively take in water through their gills.
- What percentage of the earth's surface is covered by water?
- What percentage of the earth's surface is covered by water?
- Where is over 97% of the water in the biosphere located?
- Where is over 97% of the water in the biosphere located?
- What is a reservoir?
- What is a reservoir?
- What powers the hydrological cycle?
- What powers the hydrological cycle?
- What is the movement of water down concentration gradients in terrestrial and aquatic environments responsible for?
- What is the movement of water down concentration gradients in terrestrial and aquatic environments responsible for?
Explain how terrestrial plants regulate internal water balance.
Explain how terrestrial plants regulate internal water balance.
Describe the adaptations of camels and Saguaro cacti for water acquisition, storage, and conservation in the desert.
Describe the adaptations of camels and Saguaro cacti for water acquisition, storage, and conservation in the desert.
What are the challenges faced by organisms in aquatic environments related to water and salt balance?
What are the challenges faced by organisms in aquatic environments related to water and salt balance?
How do freshwater fish and marine bony fish maintain water balance in their respective environments?
How do freshwater fish and marine bony fish maintain water balance in their respective environments?
Explain the movement of water and salt in aquatic environments through diffusion and osmosis.
Explain the movement of water and salt in aquatic environments through diffusion and osmosis.
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Study Notes
Water Regulation and Balance in Terrestrial and Aquatic Environments
- Evaporation is a major cause of water loss for organisms on land, influenced by temperature and air water content.
- In aquatic environments, water and salt move down concentration gradients through diffusion and osmosis.
- Terrestrial plants and animals regulate internal water by balancing acquisition against loss.
- Terrestrial animals gain water through drinking, food, and absorption from the air, while losing water through evaporation and secretions.
- Terrestrial plants gain water from the soil and air, and lose water through transpiration and secretions.
- Small terrestrial animals can absorb water from the air, while desert animals have specialized methods for water acquisition.
- Camels and Saguaro cacti have adaptations to acquire, store, and conserve water in the desert.
- In aquatic environments, organisms face challenges related to water and salt balance, with different strategies for freshwater fish and marine bony fish.
- Freshwater fish actively take in water through their gills and excrete excess water as dilute urine.
- Marine bony fish lose water through their gills and make up for it by drinking seawater, with specialized cells secreting sodium and chloride.
- Marine invertebrates and sharks have body fluids hypoosmotic to the surrounding seawater.
- The balance of water and salt in aquatic environments is influenced by drinking, secretion, and osmosis.
Water Regulation and Balance in Terrestrial and Aquatic Environments
- Evaporation is a major cause of water loss for organisms on land, influenced by temperature and air water content.
- In aquatic environments, water and salt move down concentration gradients through diffusion and osmosis.
- Terrestrial plants and animals regulate internal water by balancing acquisition against loss.
- Terrestrial animals gain water through drinking, food, and absorption from the air, while losing water through evaporation and secretions.
- Terrestrial plants gain water from the soil and air, and lose water through transpiration and secretions.
- Small terrestrial animals can absorb water from the air, while desert animals have specialized methods for water acquisition.
- Camels and Saguaro cacti have adaptations to acquire, store, and conserve water in the desert.
- In aquatic environments, organisms face challenges related to water and salt balance, with different strategies for freshwater fish and marine bony fish.
- Freshwater fish actively take in water through their gills and excrete excess water as dilute urine.
- Marine bony fish lose water through their gills and make up for it by drinking seawater, with specialized cells secreting sodium and chloride.
- Marine invertebrates and sharks have body fluids hypoosmotic to the surrounding seawater.
- The balance of water and salt in aquatic environments is influenced by drinking, secretion, and osmosis.
Water Regulation and Balance in Terrestrial and Aquatic Environments
- Evaporation is a major cause of water loss for organisms on land, influenced by temperature and air water content.
- In aquatic environments, water and salt move down concentration gradients through diffusion and osmosis.
- Terrestrial plants and animals regulate internal water by balancing acquisition against loss.
- Terrestrial animals gain water through drinking, food, and absorption from the air, while losing water through evaporation and secretions.
- Terrestrial plants gain water from the soil and air, and lose water through transpiration and secretions.
- Small terrestrial animals can absorb water from the air, while desert animals have specialized methods for water acquisition.
- Camels and Saguaro cacti have adaptations to acquire, store, and conserve water in the desert.
- In aquatic environments, organisms face challenges related to water and salt balance, with different strategies for freshwater fish and marine bony fish.
- Freshwater fish actively take in water through their gills and excrete excess water as dilute urine.
- Marine bony fish lose water through their gills and make up for it by drinking seawater, with specialized cells secreting sodium and chloride.
- Marine invertebrates and sharks have body fluids hypoosmotic to the surrounding seawater.
- The balance of water and salt in aquatic environments is influenced by drinking, secretion, and osmosis.
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