Compare and contrast two specific animals that darwin observed on his voyage

Two specific animals that Darwin observed on his voyage is the birds and the tortoises. He differs both animals by having to described that tortoises have shells that became different depending on the place that they are in and birds in which has different beaks based on the different parts that they lie on the island.

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.