Question

the hydrogen bonds in water will not directly influence which of the following?
○ adhesion of the setae to a walking surface.
○ bubbles forming around the foot of the gecko.
○ cohesion around the edge of the bubble.
○ surface tension of a water droplet on a leaf.

Explanation:

To solve this, we analyze each option:

• Adhesion of setae to walking surface: Gecko setae adhesion is due to van der Waals forces, not hydrogen bonds (which are in water). So hydrogen bonds in water don't affect this.
• Bubbles forming around gecko foot: Water's hydrogen bonds contribute to surface tension, which affects bubble formation (related to water - air interface).
• Cohesion around bubble edge: Cohesion in water is from hydrogen bonds, so it affects this.
• Surface tension of water droplet on leaf: Surface tension in water is due to hydrogen - bond - based cohesion, so it's affected.

So the process is eliminating options where hydrogen bonds in water are relevant.

Answer:

A. adhesion of the setae to a walking surface