The natural water sample contains only one type of bacteria.
Answer:
the first wave of extinction may be related to rapid cooling at the end of the Ordovician Period, and the second phase is widely regarded as having been caused by the sea-level fall associated with the glaciation.
Answer:
A. Rheumatoid arthritis is characterized by periods of remission and exacerbation
C. Rheumatoid arthritis can cause fatigue and weight loss
Explanation:
