A psychiatrist tells you that she is interested in determining ifthe condition of individuals who are clinically depressedimproves with either 20 or 40 milligrams of Prozac. She decides to administer 20 milligrams to a random half of her clients, and 40 milligrams to the other half. She finds that after 6 months, the clients who took 40 milligrams of Prozac aresignificantly less depressed than those cfients who took 20 milligrams of Prozac- Which type of study did the psychiatristconduct?A. correlational researchB. experimental researchC. controlled researchD. hypothetical research

Many body systems work together for proper functioning of the body and to maintain internal homeostasis. the works to break down food eaten before exercising. the takes in the nutrients obtained from the food. the body sweats as a mechanism to cool off, because the is working to flush out toxins.

Which of the following is the scientific term for an organism that makes its food from inorganic materials? a. autotroph b. heterotroph c. embryotroph

Imagine you are a student in alfred hershey and martha chase's lab in the late 1940's. you are given five test tubes with the e. coli bacteria that were infected with t2 bacteriophage that have been labeled with 32p or 35s. unfortunately, you forgot to label the tubes and are now uncertain which were 32p labeled and which were 35s labeled. you place the contents of each tube in a blender and pulse it for a few seconds to shear off the protein coats from the bacterial outer membranes. you then centrifuge the contents to seperate the protein coats and the bacterial cells. you then check for radioactivity and obtain the results shown below. which tubes contained e. coli infected with the phage labeled with 32p? select all tubes that apply.