Answer:
A
Explanation:
only one type of atom= (PURE SUBSTANCE not mixture)
is atom chemically bonded to another atom? (NO- element, not compound)
In a peptide bond formation between two amino acids, a water molecule (A) is liberated. This reaction is called condensation. The water molecule is formed by a single hydroxide ion being removed from one amino acid, and a single hydrogen ion from the second amino acid, which combine to form a water molecule.
Answer:
a. By Calculating magnetic reversals.
Explanation:
They determine the age of the ocean floor by examining magnetic fields in the planet Earth.
Human activites have greatly increased carbon dioxide levels in the atmosphere and nitrogen levels in the biosphere. Altered Altered biogeochemical cycle combined with climate change increase the vulnerability of biodiversity, food security, human health, and water quality to a changing climate.
