1. unicellular organism developed cyst why? 2. what is the effect of decreased number of RBC in body? ​

1.) Unfavorable environmental conditions such as lack of nutrients or oxygen, extreme temperatures, lack of moisture and presence of toxic chemicals, which are not conducive for the growth of the microbe trigger the formation of a cyst.

2.) If you have a low RBC count, symptoms could include:

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i'd say that the moon rock is about 2.2 billion years old.

that is wrong, its not thymus.