D, a sonic boom is only produced when a body is traveling faster than sound
Answer:
it leads by the environment
Explanation:
Answer: a. True
Explanation: These postulates were formulated by Robert Koch as a result of his experiments with healthy and infected mice. The postulates are often used to determine if a phatogen causes a disease. These are:
- The pathogen must be present in sick individuals but not in healthy ones.
- The pathogen must be isolated from individuals and cultivated in a pure culture.
- The pathogen cultivated must cause sickness when it's injected in suceptible inviduals.
- The pathogen must be isolated from the injected individuals and must be exactly as the first one.
Which step in transcription occurs first?
C. RNA polymerase attaches to the promoter.
To preserve and keep them fresh
