What were the contributing specifications in darwin study of finches

Ans.

Galapagos islands consist several small and large islands, which inhabit several organisms, including Galapagos finches. Darwin studied on the different species of those finches and explained theory of natural selection.  

The primary differences between the Galapagos finches was difference in shape and size of their beaks, which were of great interest to Darwin.

This difference was developed due to natural selection as those finches became adapted to different food sources present in islands.

Thus, the correct answer is 'differences in size and shapes of beaks.'

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Explanation:

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.