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Questions and Answers
Which of the following is a consequence of the polar covalent bonds within water molecules?
Which of the following is a consequence of the polar covalent bonds within water molecules?
- Water's ability to dissolve many substances (correct)
- Water's high boiling point
- Water's resistance to temperature changes
- Water's low density as a solid
What is the main reason for the cohesion of water molecules?
What is the main reason for the cohesion of water molecules?
- Hydrogen bonding (correct)
- Ionic bonding
- Covalent bonding
- Van der Waals forces
How does water's adhesion to polar or charged materials impact organisms?
How does water's adhesion to polar or charged materials impact organisms?
- It reduces the boiling point of water
- It increases the density of water in aquatic habitats
- It allows water to be transported against gravity in plants (correct)
- It decreases the freezing point of water
What is the role of water as a medium for metabolism and transport in plants and animals?
What is the role of water as a medium for metabolism and transport in plants and animals?
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How do the physical properties of water impact animals in aquatic habitats?
How do the physical properties of water impact animals in aquatic habitats?
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Study Notes
Water Molecules and Cohesion
- Polar covalent bonds within water molecules result in a slightly positive charge on hydrogen atoms and a slightly negative charge on oxygen atoms, leading to cohesion between water molecules.
Cohesion of Water Molecules
- The main reason for cohesion between water molecules is the attraction between the slightly positive hydrogen atoms of one molecule and the slightly negative oxygen atoms of another molecule.
Adhesion of Water to Polar or Charged Materials
- Water's adhesion to polar or charged materials, such as cell membranes, proteins, and minerals, affects the structure and function of cells, tissues, and organs in organisms.
Role of Water in Metabolism and Transport
- Water serves as a medium for metabolism and transport in plants and animals, facilitating chemical reactions and the transportation of nutrients, oxygen, and waste products.
Impact of Water's Physical Properties on Aquatic Animals
- The physical properties of water, including its high specific heat capacity, surface tension, and density, impact animals in aquatic habitats by regulating their body temperature, providing support, and affecting their buoyancy and movement.
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