Answer:
B. Ethanol
Explanation:
During absence of O2 pyruvic acid is reduced to ethanol in alcoholic fermentation.
Homeostasis: A state of balance reached through reactions within a cell or organism.
Metabolism: The total of all chemical reactions within an organism.
Organism: Any living thing that takes in food, grows, and reproduces.
Answer:
All living organisms are classified into groups based on very basic, shared characteristics. The classification of living things includes 7 levels: kingdom, phylum, classes, order, families, genus, and species . Kingdoms. The most basic classification of living things is kingdoms.
By tar, I think you mean nicotine. (I Hope). It affects the nerve signals that regulate breathing.
