Greenhouse gases such as carbon dioxide trap heat, helping warm the globe. The surge in carbon dioxide levels due to human activity since the Industrial Revolution is now causing an overall warming of the planet that is having impacts around the globe. And the burning of fuel generates not only carbon dioxide, but also air pollutants that are harmful to human health.
Answer:
Proteins and nucleic acids
Explanation:
Because they make up the capsid and core of the virus
It should be natural selection since there is no external influence implied. (like environment or genetic mutations.)
To preserve and keep them fresh
