Why do polar compounds dissolve in water?

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

Why has two different alleles for the same trait?

As scientists have investigated evolution from a variety of fields, they have found that some of darwin's orginal ideas were inaccurate or incomplete. t explanation provided by evolution was updated each time to reflect the new information they found. what does this suggest about the theory of evolution? it has become a stronger and clearer theory as new information is collected.