Kristyn is thrilled to hear she is expecting twins. her doctor informs her that the twins are dizygotic. what does this mean?

The dizygotic twins are also known as non-identical twins or fraternal twins. It refers to two siblings, which originate from distinct eggs or ova that are discharged at the similar duration from an ovary and are fertilized by distinct sperm.  

As the dizygotic or fraternal twins are two distinct fertilized eggs, they generally give rise to two separate placentas, amniotic sacs, and supporting compositions.  

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.

c. is the correct answer