During the chromosomes unwind from their condensed state and the nuclear envelope reforms around the chromatin in the two new daughter cells.

The given blank can be filled with telophase.

The telophase is the last stage of the cellular division. During the cell division in mitosis, four phases occur. These phases are the prophase, metaphase, anaphase and the telophase.

In the prophase, the condensation of the chromosomes occurs. In the metaphase, the chromosome are aligned at the equator and the spindle fibers are attached to the chromatids. In the anaphase, the sister chromatids are separated and moved to the opposite poles.

In the telophase, the chromatids start decondensing after reaching the opposite poles, and the nuclear envelop is formed around them, this results in formation of two nucleus of future daughter cell. The telophase lead to cytokinesis, which is the division of the cytoplasm.

the dark variety, as they are not visible on the dark tree barks

explanation:

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.