It is due to i believe the rise of cotton
This is the correct answer as to to <span>what extent has the presence of a true coelom in animals changed over the course of evolution:
</span><span>the presence of absence of a true coelom appears to have changed mutliple times during the course of evolution</span>
Answer:
They use 20- day months, and had two calendar years. the 260-day Sacred Round or tzolkin, and the 365-day Vague Year, or Haab. These two calendars coincided every 52 years. The 52-year period of time was called a "bundle" and meant the same to the Maya as our century does to us.
Explanation:
D. Untouchables because they were at the bottom