What is puberty? What primary and secondary changes do we experience during this period,,
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Secondary sex characteristics refer to other visible changes that mark adult maturation such as changes in height and body shape. Primary sex characteristic changes for boys include the enlargement of the testes, penis, prostate gland, and seminal vesicles.
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A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter. A white dwarf is very dense: its mass is comparable to that of the Sun, while its volume is comparable to that of Earth.
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