Word: germ
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...scientists are suited by temperament and intellect to keep vigil on the heights where paradox flourishes in the wind of metaphysics and knowledge fades into the unknown-to clock the flight of star-clouds, chop the atom's nucleus into mathematical hash or chase the primordial life-germ through a thicket of test tubes. Some workers must patrol the vales & swales where humbler things may be found beneath any stone. Such upturned stones in recent weeks disclosed the following...
...president of the Association's Zoology Section, Dr. Huxley delivered an address on "Natural Selection and Evolutionary Progress." Natural selection has been subject to much criticism because it does not account for all aspects of evolution and because Darwin gave no emphasis to mutations (sudden changes in the germ plasm). Biologist Huxley sides neither with those who would explain everything by natural selection, nor with extreme proponents of the mutation theory such as Thomas Hunt Morgan. In the Huxley view the two factors complement each other. But: "Natural selection, in fact, though like the mills of God in grinding...
...character, transmitted by a single gene. Resistance to the disease is a dominant character, and represses, but does not obliterate, the susceptibility factor whenever they occur together. A resistant individual mated to a susceptible one will have resistant offspring. But these offspring carry the susceptibility gene concealed in their germ plasm, and if they mate with susceptibles the second generation will be liable to cancer. The Slye mice show that not only inherited susceptibility but also some injury or chronic irritation is necessary for the malignant growths to appear. Dr. Slye has mice prone to cancer of the jaw which...
Just as rats make excellent laboratory animals for nutrition research, mice for cancer and monkeys for poliomyelitis, so ferrets are invaluable to influenza investigators. Ferret reactions were the basis of Harvard's Dr. William Firth Wells's demonstration last month that ultraviolet radiation kills the unknown germ or virus which causes that disease (TIME, Aug. 3). But many doctors think it probable that some infectious agencies change their form in different environments. The question remained: While human influenza could be communicated to ferrets, could ferret influenza be communicated...
...lethal effect of ultraviolet light on whatever causes influenza proved exceedingly difficult to demonstrate. Bacteriologists do not know whether an ultramicroscopic germ causes that disease or whether an ultramicroscopic virus (which may be a living organism or an active chemical entity) is involved. Best means of cultivating that invisible something is in the body of a live ferret. Working with his wife, Dr. Mildred Washington Weeks Wells, and his laboratory associate, Dr. Harold W. Brown, Mr. Wells exposed ferrets to air which had been contaminated by influenza. If the germ-laden air had been exposed to ultraviolet light...