Which term is used to describe the amino acids which cannot be synthesized by the cell but must be acquired from an outside source?

Essential amino acids

Explanation:

Some amino acids cannot be produced in our body instead they are extracted from the external food sources which are known as essential amino acids Food consumed ,provides essential amino acids. During digestion food is broken down into simple substance and protein within it is digested. Once the protein is digested, essential amino acids are extracted. In totality, there are 9 essential amino acids.

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

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both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.