14 Mitosis, the process by which the nucleus of a cell divides into two nuclei, each containing a
complete set of the cell's chromosomes, is essential to life because it
a. Contains four stages for gametes
b. Maintains genetic continuity from one generation to the next
3. Controls cell functions to ensure successful development.
d. Provides energy for the cells

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

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phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.