Which of the following statements regarding fins on fishes is true? fins are an adaptation that aid in swimming. fins resulted from a mutation caused by a movement from land to water. fins came about because animals couldn't live in water without them. fins evolved so that fish could swim better.

The correct option is A. Fins are an adaptation that aid in swimming.

Explanation:

Fins are an adaptation which brings about different kinds of locomotion in fishes. They allow fishes to move forward, to turn their bodies, to keep an upright position. They also aid the fishes to swim. Also, there are certain types of fishes which can fly using pectoral fins. However, the fins were first used by fishes for locomotion. There are different types of fins present in different kinds of fishes. Each kind of fin is best suited to perform different actions.

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.