<span>A. Stimulus is the term used to describe what causes organisms to react to their environment. Stimulus is something that can provoke organisms to respond to the world around them. For example, if you put your hand on the stove, the stove is going to be the stimulus for you to get burned and move your hand from it because it will be to hot - that is going to be your reaction to the stimulus. Camouflage is a type of hiding mechanism, parasites are organisms, and homeostasis is equilibrium in an organism. </span>
Carl Von Linneaus developed the system for classifying organisms.
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Sadness has sad feeling. for example, if a friend dies, you will cry. that is what sadness is.
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allele - different forms or versions of genes
chromosomes - structures that carry genetic information (passed from biological parents to offspring)
homologous - similar in structure
locus - a particular site or location
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