A. 25%
B. 50%
C. 75%
D. 100%

B. 50%

Explanation:

Heterozygous means that the offspring have two different alleles. Homozygous means there are are two of the same alleles.

In this Punnet Square, the offspring outcomes are:

BB, Bb, Bb and bb

BB and bb are homozygous: they have 2 of the same allele.

2 of the 4 are Bb.

Bb has two different alleles, one is the dominant allele of B( brown eyes) and the other is the recessive allele of b (blue eyes).

Therefore, there are 2 heterozygous outcomes out of the 4 outcomes. 2 out of 4 is equivalent to 1/2 or 50%. Thus, the correct answer is B. 50%

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.