The answer is C. The dominant trait will be present in all cells in a Punnet Square, meaning the dominant trait will be shown in the entire F1 generation, but if an offspring from the F1 generation mates with a parent with only recessive traits (aa), it will create one offspring in the F2 generation that will have the recessive trait showing. Ex: F1: Aa - other parent: aa.
Answer:
Water striders are able to walk on top of water due to a combination of several factors. Water striders use the high surface tension of water and long, hydrophobic legs to help them stay above water.
Water striders use this surface tension to their advantage through their highly adapted legs and distributed weight. The legs of a water strider are long and slender, allowing the weight of the water strider body to be distributed over a large surface area. The legs are strong, but have flexibility that allows the water striders to keep their weight evenly distributed and flow with the water movement. Hydrofuge hairs line the body surface of the water strider.
An electromagnet is represented in the diagram