Answer:
Because that is when oil and other harmful fumes to ecosystems first started appearing, and they did not care about animals back then as much, an example could be when they sprayed pesticides to kill weeds but instead almost killed a huge bird population. Most marine animals did not start dying and becoming endangered species until we did many oil spills into the ocean.
Explanation:
hope this helped i want to be a marine biologist when i graduate uwu
Answer:
D. disease specific antibodies
Explanation:
Answer: A compound is a substance in which two or more elements are combined together chemically.
Explanation: Elements present in a compound are always in a fixed proportion and can be separated only by a chemical method. For example, water is a compound composed of hydrogen and oxygen atoms in the ratio of 2:1. The chemical formula of water is H2O.
independent variables, dependent variables, and experimental units hope this helps
Petroleum Products
Petroleum and its products are mainly composed of carbon polymers (chains), as the backbone, with different structural and functional groups. Plastic, for example, is made of polypropylene and polybutylene which is mainly made of carbon atoms, whose monomers are linked in a chain to form polymers that make up the products.
Synthetic rubber on the other hand is made of copolymers of carbon and other addictives such as styrene. Synthetic fiber is made of nylon that is composed of a copolymer between carboxylic acid and amides.
