IB Biology Topic 4.1

What is the role of water in maintaining temperature regulation in organisms?

• Water acts as a coolant and facilitates heat transfer through processes like sweating and evaporation.

• Water has no role in maintaining temperature regulation in organisms.

• Water acts as an insulator and traps heat within the body.

• Water absorbs heat from the environment and raises the body temperature.

Tags

NGSS.HS-LS1-3

Explain the importance of water in the transport of nutrients and waste in living organisms.

• Water is essential for the transport of nutrients and waste in living organisms.

• Nutrients and waste can be transported without the presence of water.

• Water is only important for the transport of nutrients, not waste in living organisms.

• Water has no role in the transport of nutrients and waste in living organisms.

Tags

NGSS.HS-LS2-4

A phospholipid has 2 parts. What are they called? 

• Hydrophilic Head, Hydrophobic Tail 

• Hydrophobic Head, Hydrophilic Tail 

A ______________ is composed of a phosphate and glycerol head and 2 fatty acid chain tails. 

• phospholipid 

• Carbohydrate

• Cholesterol 

• Protein 

What are the three main properties of water?

• solid, low specific heat capacity, buoyancy

• gas, low specific heat capacity, viscosity

• liquid, high specific heat capacity, surface tension

• solid, low specific heat capacity, adhesion

Tags

NGSS.MS-ESS2-4

Explain the concept of polarity in water molecules.

• Absence of electrical charge within the molecule

• Equal distribution of electrical charge within the molecule

• Uneven distribution of electrical charge within the molecule

• Polarity refers to the shape of the water molecule

Tags

NGSS.HS-ESS2-5

Why is water considered a universal solvent?

• Water is considered a universal solvent because it is made up of many different elements.

• Water is considered a universal solvent because it is highly acidic.

• Water is considered a universal solvent because it has a low boiling point.

• Water is considered a universal solvent because it has the ability to dissolve a wide variety of substances due to its polar nature.

Hydrophilic means...

• water-loving

• water-fearing

• nonpolar

• lipid soluble

At room temperature, water is a liquid and methane is a gas. Which molecular property explains this difference?

• Higher molecular mass of water

• Dipolarity of water

• Presence of more hydrogen in methane

• Higher boiling point than methan

Which substance is more likely to dissolve in water?

• Hydrophillic

• Hydrophobic