Answer:
The FDA regulates the use of medicines, vaccines and food supplies in the United States thus contributing to the public health of the country. This organization is classified as a federal consumer protection agency. The FDA gives tools through its means and scientific knowledge to users to make decisions.
Cutting down trees results in loss of habitat for many animals in the wild, because over 70% of animals that live on land live in trees! Cutting down trees can also reduce our oxygen.
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A covalent bond is a bond between 2 non-metals (sharing of electrons between atoms), where ionic is between a metal and a non-metal (the transfer of electrons). Standard covalent bonds are usually weaker then ionic bonds.
Covalent - Hydrogen + Chlorine = Hydrogen Chloride (HCl)
Ionic - Sodium + Chlorine = Sodium Chloride (NaCl)
Sunlight doesn't reach quite as well in deeper parts of the ocean. Therefore, the autotrophs cannot use photosynthesis to make food.