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Zygotic life cycle, illustrated by the unicellular flagellate genus Chlamydomonas
The life cycle of a flowering plant, illustrated by the genus Polygonum
Basic overview of energy and human life.
The pancreas. This organ sits just below the stomach and is both an exocrine and an endocrine gland.
In 1839 Mary Cragin, at the age of twenty-nine, became a convert to John Humphrey Noyes’s “communism
Cumulative change for six personality-trait domains across the life course show distinct patterns.