In physical science there are two types of "isolated systems"
1. Being a Physical System in which it is so far removed from other systems that it does not react with any of them.
2. Being a Thermodynamic System in which it is enclosed by rigid immovable walls of which neither mass nor energy can flow through.
I believe in this case although not stated that it would refer to a Thermodynamic System which would leave you with the only plausible answer as ENERGY AND MATTER CANNOT ENTER OR LEAVE.
None of the other answers make sense. Even if it were referring to Physical. Physical does not react with anything at all. An as you can see Thermodynamic does not allow for anything to pass through or leave.
Answer:
The correct option is: c. The synthesis and degradation of body proteins
Explanation:
Protein turnover refers to the <u>process of breakdown of the old protein molecules and its replacement in the human body.</u> It involves the following two processes: protein degradation and protein synthesis.
The protein degradation occurs in the lysosomes and in the cytoplasmic complex known as proteasome. Whereas, protein synthesis occurs on the ribosomes.
It has increased pollution a lot as now milk is processed in factories that emit poisonous gases.
Answer: d. All of the above are correct.
Explanation: Natural resources are resources provided by nature. They occur in nature without manmade interference. Natural resources include mineral deposits, land water bodies and the atmosphere. These resources are utilized by man for economic, social and educational purposes. Natural resources can be renewable or nonrenewable resources such as water are renewed by rainfall. Heavy manmade activities such as industrialization, war or natural disasters can deplete these resources.