When sound waves hit a solid surface they either reflect, refract, or absorb.
Echo's are caused by the reflection of sound waves.
The answer is d. <span>antipsychotics. </span>Risperidone (Risperdal, Janssen, and generics), a second-generation antipsychotic is the first drug issued by the FDA to treat Autism Spectrum Disorder (ASD). <span>The </span>antipsychotic<span> drug Risperdal may cut aggressive behavior in children with </span>autism<span>.</span>
<span> A cell typically expresses only a fraction of its genes and the different types of cells in multi cellular organisms rise bc of its different set of genes are ex-pressed
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The birds with the beaks most suited towards digging and grasping. If they find their food deep underground, the beak would need to be able to push through the dirt and be able to keep the worm in it for consumption.
