Answer: During the Cambrian Explosion of Animal Life
6 chromosomes. This is because gametes are usually characterised as to having only half the number of chromosomes of the somatic cells.
This is done through meiotic division.
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Coughing can be a symptom along with shortness of breath
Answer: High-pressure systems are frequently associated with light winds at the surface and subsidence through the lower portion of the troposphere. In general, subsidence will dry out an air mass by adiabatic or compressional heating. Thus, high pressure typically brings clear skies.