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The root may be important, for roots are known to export cytokin- ins to the shoot.
Daily Environmental factors, primarily photoperiod (daily length of length of
darkness) and temperature, play important darkness parts in governing
The prevention, control, and eradication of diseases of economically important
animals are agricultural concerns. Programs for the control of diseases
communicable from animals to man, called zoonoses, especially those in pets
and in ...
Such animals, which act as hosts, agents, and carriers of disease, are important
Role of do- in causing and perpetuating human illness. Because about
mesticated three-fourths of the important known zoonoses are asso- animals
ciated with ...
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review