Answer:
Bacteria are single-celled organisms that live in different environments, including cold and hot, and they can also live on or inside the human body.
Most types of bacteria are harmless, on the contrary, they help in the process of digesting food, attacking other microbes and fighting cancer cells, and less than 1% of bacteria are bacteria that cause diseases.
As for viruses, they are very small organisms, smaller than bacteria, consisting of DNA and a protein that coat them, and unlike bacteria, a virus does not reproduce without its presence in the cells of living organisms.
Answer:
evolution is random
Explanation:
there is no explination for evolution over time things find there own way to be better
North America or Asia because of pollution.
Housekeeping genes are those genes in the body that are required for the maintenance of basic cellular functions and they are found in all the cells of living organisms. One of the characteristics that are associated with the housekeeping gene is that THEY ARE TRANSCRIPTIONALLY ACTIVE. This means that they have the capacity to undergo transcription.
