Exploring Surface Area and Volume in Biology

What is the primary reason cells are small?

• To maximize their surface area to volume ratio for efficient diffusion.

• To minimize the energy they use.

• To make it easier for them to move.

• To reduce the amount of DNA they need.

What happens to the surface area to volume ratio as a cell grows larger?

• It increases.

• It decreases.

• It doubles.

• It remains the same.

Why is diffusion important for cells?

• For DNA replication.

• For cell division.

• For the exchange of materials with the environment.

• For cellular respiration.

Why do elephants have large ears?

• To hear better.

• To display dominance.

• To regulate body temperature through heat diffusion.

• To scare off predators.

How do large ears benefit elephants?

• Improved hearing.

• Heat dissipation.

• Enhanced smell.

• Better balance.

How do flatworms facilitate gas exchange?

• Using gills.

• Through a specialized respiratory system.

• Through their skin, by diffusion.

• Using lungs.

What adaptation helps whales maintain body temperature in cold water?

• Large size to decrease surface area to volume ratio.

• Hibernation.

• Fast swimming.

• Blubber.

What is the effect of holding arms against the body in cold weather?

• Increases surface area to volume ratio.

• Increases body temperature directly.

• Decreases surface area to volume ratio.

• Has no effect on surface area to volume ratio.

Why are the villi in the small intestine wavy?

• To increase the surface area to volume ratio for better absorption.

• To protect the intestine from harmful substances.

• To make the intestine more flexible.

• To slow down food movement.

What demonstrates the importance of surface area to volume ratio in biology?

• The shape of animal ears.

• The size of cells.

• None of the above.

• All of the above.