Alabrador retriever breeder needs to determine if three male pups who were born to sadie, his black labrador retriever, are the offspring or sam, a yellow labrador retriever from another breeder which process could the breeder use to determine if sam is the father of the pups? o pcr analysis ostr analysis o mtdna analysis oy-chromosome analysis

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

How does secondary succession differ from primary succession?