Final answer:
Cohesion is fundamental for water transport in plants, as it enables water to move up from the roots to the leaves. It also creates surface tension, allowing certain insects to walk on water. Meanwhile, ice floats because it is less dense than liquid water, not more.
Step-by-step explanation:
The correct statement here is: Cohesion helps plants transport water from their roots to their leaves. Cohesion is due to the attraction between water molecules which creates a pulling force that moves water and dissolved minerals up through the plant. This process utilizes both cohesive and adhesive forces, with cohesion causing water molecules to stick together, while adhesion refers to the attraction between water molecules and other types of molecules, such as those in plant cell walls. This phenomenon is critical for the survival of plants as it facilitates the transportation of essential nutrients.
Surface tension is another important property formed because of cohesion, allowing for the formation of water droplets and supporting lightweight objects that are placed gently upon the water's surface. Surface tension is a measure of how difficult it is to break the surface of a liquid, and it's the reason why certain insects can walk on water's surface without sinking.
The statement regarding the solid form of water being more dense than the liquid form is incorrect. In reality, ice is less dense than liquid water, which is precisely why ice floats on top of water.
As for the dissolving power of water, this characteristic is due to water's polarity and is indeed crucial for life, especially for the transport of nutrients throughout an organism’s body including in blood. However, this is not what was asked in the true/false question.