In a cross Bb x Bb (B = Blue petals and b = pink petals), how many offspring will have the genotype Bb?

2 offspring will have the genotype Bb.  

Explanation:

Crossing the genotypes Bb and Bb results in 2, or 50% of the offspring having the genotype Bb.  In the top right box, the B on the top and the B on the side make the BB genotype.  In the top left box, B and b make the first Bb genotype.  The lower right box crosses B and b to make the second Bb genotype.  The last box in the bottom right crosses b and b, resulting in the genotype bb.  So, after crossing the genotypes written on the top and side of the punnet square, 2 of the offspring will have the Bb genotype.  (I got this by combining the letters outside the punnet square in the box where the row and column meet) .

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.