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Clinical Trials Post Test
December 2, 2020
Welcome to your Clinical Trials Post Test
Cold sores are caused by the herpes simplex virus type 1. Which question might a company that wants to develop antiviral drugs for cold sores ask before beginning clinical trials?
A. How closely related is the cold sore virus to cold viruses?
B. How does the cold sore virus develop in the human body?
C. Does the cold sore virus affect other species?
D. How does the cold sore virus respond to changes in temperature?
Based on these data, which hypothesis was Connell most likely testing?
A.The two species of barnacles compete with each other for resources resulting in a decline in population of both barnacle species.
B. If the barnacles are in warm water then the popuation of both species will increase.
C. Isolating barnacle species will cause them to grow larger.
D. If the two species of barnacles live near each other then they are closely related.
What should the student do to improve this experiment?
A. Use blocks of equal mass on the four pieces of elastic.
B. Use blocks with enough mass to cause the four pieces of elastic to break.
C. Use more than four pieces of elastic and four blocks.
D. Use four pieces of elastic with different lengths but the same width.
Which group served as the control in this clinical trial?
A student conducted an experiment to determine if listening to different types of music would affect pulse rate. She thought that pulse rate would increase with a faster beat. Each person participating in her experiment listened to seven different selections of music for 30 seconds each. The pulse rates were taken after each 30-second interval of music. Based on the data from her experiment, the student concluded that a person's pulse rate increased when listening to music with a faster beat. The component missing from the scientific method process is:
C. Communicate results
D. Research plan
The analysis of data gathered during a particular experiment is necessary in order to
A. formulate a hypothesis for that experiment.
B. develop a research plan for that experiment.
C. design a control for that experiment.
D. draw a valid conclusion for that experiment.
A biologist reported success in breeding a tiger and a lion, producing healthy offspring. Other biologists will consider this conclusion reliable only if
A. research shows that other animals can be crossbred.
B. the offspring are given a scientific name
C. the biologist included a control in the experiment.
D. other researchers can replicate the experiment.
What question is the student most likely trying to answer with this experiment?
A. What is the difference in texture between wet and dry soils?
B. How well do different soils grow plants?
C. How much water is needed to dissolve different soils?
D. How much time does it take for different soils to drain?
A group of students is performing an investigation to measure how much liquid water is produced from 10 L sample of snow in 30 minutes. What is missing from this experiment?
A. The students need to measure the amount of water at 10 minutes, 20 minutes, and 30 minutes.
B. The students must introduce one independent variable to study, such as temperature or type of container.
C. The students must record the physical properties of snow.
D. The students must change two or more variables that will affect the amount of water produced.
After examining the fossil record, scientists have determined that scorpions today are much smaller than their extinct ancestors. For example, Jaekelopterus rhenaniae, a giant scorpion species that lived 255 million to 460 million years ago, was 2.5 meters long. Which of the following conclusions is best supported by the data collected by scientists?
A. Scorpions living today have increased their numbers since they first appeared.
B. Scorpions in the fossil record are smaller than their descendants are.
C. Scorpions have changed in size over time.
D. The color of scorpions is genetically linked to their size.
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