Niels Bohr - Biographical. Niels Henrik David Bohr was born in Copenhagen on October 7, 1885, as the son of Christian Bohr, Professor of Physiology at Copenhagen University, and his wife Ellen, nÃ©e Adler.
Opuntia is a large genus of plants native to North America and South America. All have succulent stems, some of them becoming woody with age. Stems may be cylindrical or flattened pads. Tiny, succulent leaves may be present on the newest growth (see photo below.) Most species are spiny.
1 Opunitieae-genera Opuntia (prickly pear cactus), Pereskiopsis, Pterocactus, Quiabentia, Tacinga. 2  Fleshy, branched plants, areoles may or may not have spines but always have fine hairs (glochids), leaves are flat or cylindrical, spines are usually straight, the fruit is a seedy berry.