Why Are Cells Small?

Two cylinders are created from identical sheets of paper. Cylinder A is formed by rolling the paper along its shorter side, resulting in a tall, narrow cylinder. Cylinder B is formed by rolling the paper along its longer side, resulting in a shorter, wider cylinder. Which cylinder will have a greater internal volume?

• Cylinder A

• Cylinder B

• Both cylinders will have the same internal volume.

• The internal volume cannot be determined without knowing the paper dimensions.

According to Allen's Rule, what body characteristic is typically observed in warm-blooded animals adapted to cold environments?

• Longer limbs and slender bodies to maximize heat dissipation.

• More compact bodies with shorter limbs to minimize heat loss.

• Larger ears and tails to increase surface area for cooling.

• Thinner fur or less insulation to prevent overheating.

When a large piece of material is broken down into many smaller pieces, how does this change affect its total surface area relative to its total volume?

• The total surface area decreases, and the total volume increases.

• The total surface area increases, and the total volume decreases.

• The total surface area increases, while the total volume remains approximately the same.

• The total surface area remains approximately the same, while the total volume decreases.

Why do cells maintain a small size rather than growing indefinitely large or becoming infinitesimally small?

• Small size allows for faster cell division and reproduction.

• Small size optimizes the surface area to volume ratio for efficient nutrient uptake and waste removal, while also providing enough internal space for essential cellular machinery.

• Larger cells would be more susceptible to damage from external forces.

• Infinitesimally small cells would lack the necessary energy production capabilities.