Only around 10% of bacteria is harmful, so the majority of bacteria is helpful.
How about "recombinant DNA?" Which is the result of DNA cloning as ttom suggests.
The answer to the question ; Land ____ is a hazard in which an area of land sinks down due to removal of underground material is letter B. The Subsidence. So we should read it as, The land subsidence is a hazard in which area of land sinks down due to removal of underground material. B, Subsidence.
The three muscles that are usually used for intramuscular injection are deltoid muscle, vastus lateralis muscle and gluteus medius muscle. The one most often used for babies I think is the deltoid muscle. Please ask if you need more explaining or if you need anything else. I hope this helps. :D