Answer:
Polymers are made from a chain of one similar subunit bound together in sequence. Proteins are made from polypepetide chains which are sequences of amino acid subunits. Another example of polymer is DNA and RNA made of nucleic acid subunits.
However, lipids do not have one similar subunit but rather variable ways in which the lipid chains can form. For example phospholipid unit is made of a phosphate molecule bound to a fatty acid chain and glycerol. A triglyceride is a subunit of glycerol bound to three fatty acids chains. Cholesterol is also considered a lipid but is made of carbon rings rather than chains. Lipids therefore cannot be referred to as a polymer.
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Water has some unusual properties due to its hydrogen bonds. One property is cohesion, the tendency for water molecules to stick together. The cohesive forces between water molecules are responsible for the phenomenon known as surface tension.
Answer:
Energy stems from the sun
Explanation:
Think about it, A plant takes energy from the sun and then a worm eats it soon after a bird eats that worm then when the bird dies its body is fed to fungi or back to plant life. Pretty much the sun is our biggest source of energy
Also The sun is our major source of heat without the sun we would freeze and perish.
Answer:
The elements in each group have the same number of valence electrons. As a result, elements in the same group often display similar properties and reactivity.
