A double-blind study is one in which neither the researchers nor the subjects know who is receiving the real treatment and who is receiving the placebo. why are studies designed in this way?

Prior to modern DNA analysis, morphology (study of physical characteristics) was used to classify organisms. As a result of DNA analysis, some organisms were found to be misclassified. Why were they misclassified?

A roach moves down the hall at 1.2 m/s. When he sees the janitor coming down the hall, he begins to run. After 3.2 s, he is moving at 3.6 m/s. What is his acceleration

Which of these describes the function of the liver? A. store blood and disintegrate old blood cells B. add white blood cells to the blood stream C. store bile until needed for the digestion process D.

Identify the true statement. Choose one: A. A biogeochemical cycle involves only physical components. B. The rock cycle is the only mass-transfer cycle on the Earth. C.

How does alcohol affect academic performance? select all that apply?

A population is defined as all of the inhabitants of a given country or area considered together. a. True b. False

How does random fertilization add to genetic variation? a) reshuffling of randomly picked up chromosomes b) random fusion of genetically unique gametes c) exchange of genetic material between homologous chromosomes

When the energy of a light wave is transferred to a particle and causes it to vibrate and generate heat, the energy of the light wave is what?

Which statements about a child with brown eyes must be true? Choose more than one answer

I observe that squirrels that live in the southeastern United States are much thinner than squirrels that live in the northeastern part of the country.