thousands of years ago, animals were observed by humans, their behavior and humans would face what things caused the animals to be sick or die, and they would learn what caused it. legitimate plants were known to be toxic to animals and if humans were to consume it, they in addition would likely die or create ill. it was this method of musing that led to actual experimentation. when animals were exposed to toxins or bacteria measuredly by humans, they would observe the reactions of the animals and learn what substances or pathogens would cause animals to become sick and die, or conversly what would cause animals to stay healthy and thrive.
in the modern world, animal experimentation has entered a new phase, where animals atomic number 18 confined to cages within experimental labs in poor conditions. they may be exposed to harmful or unknown substances to see if the substance or chemical was harmful or beneficial.
they argon selectively bred to see what changes or differences they would see in the animals offspring. this is how umpteen drugs were developed, and how many conditions could be healed.
this animal experimentation has exceeded its goal of protect human lives. millions of animals are kept in poor conditions to try the toxicity of anything from cleaning products to drugs, from makeup to nutrition supplements. in assemble to make more milk production, or chickens to lay large and better eggs in search of earning more profits.
the severeness to animals is methodical and widespread, animals are bred and sold to laboratories, to live their lives and die in a...If you want to get a full essay, order it on our website: Ordercustompaper.com
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