What are the two key factors to be able to exchange enough oxygen and carbon dioxide to keep an organism alive?Large surface area and wet membranesLarge surface area and dry membranesLarge volume and dry membranes

The two key factors to be able to exchange enough oxygen and carbon dioxide to keep an organism alive are Large surface area and wet membranes. This is because a large surface area allows for more gas exchange to occur, and wet membranes are necessary as gases such as oxygen and carbon dioxide are dissolved in water before they can be transported across cell membranes.

The two key factors to be able to exchange enough oxygen and carbon dioxide to keep an organism alive are Large surface area and wet membranes.

1. Large Surface Area: The larger the surface area, the more space there is for gases to be exchanged. This is why our lungs are made up of millions of tiny air sacs called alveoli, increasing the surface area for gas exchange.

2. Wet Membranes: Gases such as oxygen and carbon dioxide are exchanged across wet membranes. This is because gases diffuse more easily through wet surfaces. In our lungs, the alveoli are covered in a thin layer of moisture which allows the gases to dissolve and then diffuse across the cell membranes.