Answer
The cyst stage is a dormant state of protozoa, in which the protozoa covers itself with a tough cell wall consisting chitin. It is useful because:
1. It is the survival mode of protozoa, which helps it survive very harsh conditions.
2. It helps protozoa to be dispersed long distances.
3. It helps to get past harmful conditions. For example some types get past the stomach in the cyst condition, and when they reach the intestine, they again become alive and cause diseases such as dysentery.
Work Step by Step
The cyst stage is a dormant state of protozoa, in which the protozoa covers itself with a tough cell wall consisting chitin. It is useful because:
1. It is the survival mode of protozoa, which helps it survive very harsh conditions.
2. It helps protozoa to be dispersed long distances.
3. It helps to get past harmful conditions. For example some types get past the stomach in the cyst condition, and when they reach the intestine, they again become alive and cause diseases such as dysentery.
