Penguins and sharks have forelimbs adapted for swimming but do not share a recent common ancestor with a fin adapted to swimming. What term best describes the evolution of these species?

How are viruses different from eukaryotic cells?

Where is pericardial fulid located

Abeaker of water was heated and then placed on a bench in the laboratory. the water cooled until it was the same temperature as the air in the laboratory. which of these explains the mechanism by which the water cooled? a. heat energy was transferred from the water to the air. b. water molecules from the water formed warm water currents. c. the water molecules absorbed energy from the molecules in the air. d. the water released radiation until it contained no heat energy.