In anaphase I, homologouspairs are separated but sister chromatids stay joined together. <span>The "I" in anaphase I refers to the first round of cell division, which resembles ordinary mitosis. So in anaphase I, the homologous pairs separate but the sister chromatids stay together. Then the cell goes directly into a second round of cell division - in anaphase II, the sister chromatids are separated into four (now haploid) cells.</span>
The answer is Light exposure
If cells couldn't specialize, then the heart and other important organs would not function because if all cells did the same thing, the human would be one massive organ.
Traits heritable only if the similarity arises from shared genotypes
Answer:
The need for continental time zones stemmed directly from the problems of moving passengers and freight over the thousands of miles of rail line that covered North America by the 1880s. Since human beings had first begun keeping track of time, they set their clocks to the local movement of the sun.
