The nucleus is the structure inside a cell that directs cell activities. Color-producing chemicals in cells are known as pigments. Most cells spend the vast majority of their life in telophase. Mitosis is the process that reduces the chromosome number in half. Glucose stores the sun's energy in chemical form.
Anaerobic respiration produces more energy for cells than does aerobic respiration.
The cells of plants and animals are eukaryotic cells. Science is a never ending search for truth. Cells come only from other cells. The larger an organism, the larger its cells. Chromosomes can be seen when a cell is in interphase.