Answer:
A pure culture consists of only one type of microbe while a mixed culture has two or more than two microbes.
Explanation:
A pure culture consists of only one type of microbe.
While a mixed culture consists of more than one type of microbes. such cultures may comprise of different species of bacteria or a group of bacteria, viruses and other pathogens.
In mixed culture the microbe species living together may harm each other existence.
Answer:
(1) Nitrite poisoning
(2) Its cause is elevated levels of nitrite in the pond or culture system water.
It would be probably be 1, as the recommended would be the average
The answer is: Abscisic acid.