Selection of animals for visible “desirable” traits may make them unfit in other, unseen, ways. The consequences for the captive and domesticated animals were reduction in size, piebald color, shorter faces with smaller and fewer teeth, diminished horns, weak muscle ridges, and less genetic variability. Poor joint definition, late fusion of the limb bone epiphyses with the diaphyses, hair changes, greater fat accumulation, smaller brains, simplified behavior patterns, extended immaturity, and more pathology are a few of the defects of domestic animals, All of these changes have been documented in direct observations of the rat in the 19th century, by archaeological evidence, and confirmed by animal breeders in the 20th century.
One side effect of domestication has been zoonotic diseases. For example, cattle have given humanity various viral poxes, measles, and tuberculosis; pigs and ducks have given influenza; and horses have given the rhinoviruses. Humans share over sixty diseases with dogs. Many parasites also have their origins in domestic animals. The advent of domestication resulted in denser human populations which provided ripe conditions for pathogens to reproduce, mutate, spread, and eventually find a new host in humans.
Read more about this topic: Domestication
Other articles related to "limits":
... In the United States, such limits are usually formally described in a state, provincial, or territorial law (or an appropriate regulation) as being under the control of the municipal ... It is customary to indicate city limits with the posting of signs on major freeways, highways, and arterial roads ... Property within city limits is subject to city taxation and city regulation, and expects city services ...
... Some jurisdictions set lower speed limits that are applicable only to large commercial vehicles like heavy trucks and buses ... While they are called "truck speed limits", they generally do not apply to light trucks ...
... the freeway as well as additional signs alerting drivers about the use of variable speed limits ... The limits will vary between 40 and 60 miles per hour, depending on traffic conditions, and could change by up to 5 mph every 5 minutes ... These speed limits, as of January 2012, are now posted as "Advisory Speed Limits" ...
... Flammability limits, also called flammable limits, give the proportion of combustible gases in a mixture, between which limits this mixture is flammable ...
... Speed limits in the United States are set by each state or territory ... Speed limits vary primarily due to state laws, but also due to the type of road, land use, and more ... Some states have lower limits for trucks and night ...
Famous quotes containing the word limits:
“You must confine yourself within the modest limits of order.”
—William Shakespeare (15641616)
“The great ship, Balayne, lay frozen in the sea.
The one-foot stars were couriers of its death
To the wild limits of its habitation.
These were not tepid stars of torpid places
But bravest at midnight and in lonely spaces,
They looked back at Hans look with savage faces.”
—Wallace Stevens (18791955)
“... there are no limits to which powers of privilege will not go to keep the workers in slavery.”
—Mother Jones (18301930)