Question

large particles (or large quantities of smaller particles) are moved across the cell membrane with the use of energy.
co₂ + o₂ transport
pump transport
osmosis
bulk transport

Explanation:

To solve this, we analyze each option:

• \( \text{CO}_2 + \text{O}_2 \) Transport: Involves gas exchange (diffusion, passive, no energy for large particles).
• Pump Transport: Moves ions/molecules (not large particles in bulk).
• Osmosis: Water movement (passive, no energy for large particles).
• Bulk Transport: Moves large particles (or large quantities of small ones) across cell membranes, requiring energy (e.g., endocytosis/exocytosis).

Answer:

D. bulk transport