Two key characteristics of a good scientific investigation are hypothesis and observation of whatever organism your studying.
Answer: Characteristics: The fins are supported by rays, as the name indicates. In contrast to the cartilaginous fish they have a rigid skeleton. The swim bladder is also a unique feature of most ray-finned fish, enabling them to maintain buoyancy as they move up or down in the water.
Prophase is a Triangular Square Telophase is a Circle with cylinders
Distillation is a method for separating the components of a mixture based on boiling point differences
