<span>If you google your question this comes up - Name the four classes of carbon-containing molecules used by living things, and explain how the nitrogen and carbon cycles contribute to the usable supplies of these macromolecules. The carbon-containing (organic) macromolecules necessary for life are proteins, carbohydrates, lipids and nucleic acids.</span>
Answer:
DNA sợi đôi hấp thụ kém mạnh hơn vì tương tác xếp chồng giữa các base.
Explanation:
Quá trình này được gọi là sự thay đổi siêu sắc tố. Các gốc purine và pyrimidine trong DNA hấp thụ tia cực tím.
Answer is c. Natural gas.
Natural gas is a fossil fuel in liquid form that can be used as an energy source. It is found in subterranean reservoirs, often near oil deposits. It is non-renewable energy source. It takes very long time to renew. Natural gas is less pollutant as compared to coal and petroleum because when it's burned, it releases 25 % fewer greenhouse gases and pollutants. hydroelectric power, solar power and nuclear energy are renewable sources.
List of large volcanic eruptions in the 21st century
VEI Volcano (eruption). Country
2 Mount Sinabung Indonesia
4 Kelud Indonesia
3 Mount Ontake Japan
4 Calbuco Chile
23 more rows
You should always suppose to have safety goggles because you don't want to hurt your eyes
