The hollow<span> part of a </span>bird bone<span> isn't wasted space. In some </span>bones<span>, the </span>hollow<span> cavities contain extensions of the air sacs from the lungs. These air sacs help the </span>bird<span> to get the oxygen it needs to fly quickly and easily.</span>
B. More drastic change than a point mutation
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The two hydrogen atoms and one oxygen atom within water molecules (H2O) form polar covalent bonds. ... As a result of water's polarity, each water molecule attracts other water molecules because of the opposite charges between them, forming hydrogen bonds
Answer:
The goal of materials engineering is to predict and control material properties through an understanding of atomic, molecular, crystalline, and microscopic structures of engineering materials
