It depend some plants have the waxy layer because of their cuticles and to make sure the leaf doesn't dry out or to protect it againts the harmful sun rays when directly shined on its good to have sun but not too much. HOPE THIS HELPS
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Because it is a muscular body organ
Viruses have not a nucleus, but they have viral DNA that they can transplant into other healthy cells to infect them.
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In terms of the giraffeexample, Darwin's theory of evolution through natural selection wouldsuggest that a giraffewas born with a longer neck by random chance. ... Having access to more food allowed the giraffe to live longer and reproduce more, ultimately leading to more long-neck giraffes.
