The diagram shows the life cycle of a fern. what does stage 4 show?

Compare and contrast cladistics and phylogeny. what are their advantages and disadvantages? which is the most useful in understanding how an organism developed into its current form? which concept most strongly supports your opinion about the origin of any given organism?

All eukaryotic cells contain small bodies called

How can an organ, such as the lungs, work for multiple body systems?