What statements are correct containing human dna?

How does the study of genetic disorders such as pku biologists understand normal alleles?

Membrane vesicles containing an internal sodium chloride (nacl) concentration of 0.14 m are placed into separate beakers each containing a different solution. the first beaker contains 0.14 m sucrose, while the second beaker contains 0.14 m calcium chloride (cacl2). the temperature is 25°c. what is the solute potential inside the vesicles, expressed in units of mpa?

There are only about 250,000 known fossil species. true or false