Earth, Climate and Environment. Science, Technology and Discoveries. Or groups of atoms called. The arrangement of particles in a material depends on the physical state of the substance. Particles form a compact structure that resists flow. Than those in a solid. They can flow past one another, but they remain close. It forms part of the cell walls in plants, constitutes part.

Earth, Climate and Environment. Science, Technology and Discoveries. Pulsar, in astronomy, a neutron star. The intense magnetic field and plasma. That are believed to surround a neutron star provide an effective source of radio waves. The high-energy electrons of the plasma spiral around the magnetic field and emit radio waves and other forms of electromagnetic radiation.

Earth, Climate and Environment. Science, Technology and Discoveries. Systems of the Human Body. Eye disorders may be classified according to the part of the eye in which the disorders occur. Macular degeneration is a frequent cause of loss of vision in older persons. Juvenile forms of this condition also exist. For disorders of the crystalline lens, see Cataract.

Earth, Climate and Environment. Science, Technology and Discoveries. Macular Degeneration, leading cause of irreversible vision. Loss in the United States. This incurable condition attacks the central portion of the retina, the part of the eye. Which slows the growth of blood vessels. Sparse scientific evidence exists to support controversial theories that nutrition and other lifestyle factors can reduce the risk.

Earth, Climate and Environment. Science, Technology and Discoveries. Cattle are classified in the phylum Chordata, subphylum Vertebrata, class Mammalia, order Artiodactyla, family Bovidae. See also beef; dairying.

Earth, Climate and Environment. Science, Technology and Discoveries. Science, Technology and Discoveries. A stamp depicting the image of Hanaoka Seishu. The Studies of Science and its Branches. Earth, Climate and Environment.

Earth, Climate and Environment. Science, Technology and Discoveries. Plant, any member of the plant kingdom, comprising about 260,000 known species of mosses. Herbaceous and woody plants, bushes, vines. Giant Granadilla, strong, rapidly growing vine, member of the passionflower. Science, Technology and Discoveries.