These preparations are called Vaccines. A vaccine is a biological preparation that provides active acquired immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing micro-organism and is often made from weakened or killed forms of the microbe, its toxins or one of its surface proteins.
It’s very confusing sorry for that
Answer:
(1) Nitrite poisoning
(2) Its cause is elevated levels of nitrite in the pond or culture system water.
Scientist can communicate their findings by putting them on a journal and publish them
Answer:
Mitochondrial DNA is useful as a molecular clock because it displays uniparental inheritance
