I think the statement above is true. <span>Metamorphic rocks can be made up of newly-crystallized minerals formed during metamorphism but they can also include pre-existing minerals unchanged since their crystallization in an igneous rock.</span>
Answer: four criteria to establish a causative relationship between a microbe and a diseases
Explanation:
1- "Bacteria must be present in every case of diseases"
2- "Bacteria must be isolated from the host with the diseases and grown in pure culture"
3- "The specific diseases must be reproduced when a pure culture of bacteria is inoculated into a healthy susceptible host"
4-"Bacteria must be recovered from the experimentally infected host"
Negative - Negative = rejection
Positive - Positive = rejection
Positive - Negative = atraction
Nucleic acids contain the genetic code.
