Exam 1 Biology 102

What is the first step that starts the whole process of the scientific method?

• Observation
• Conclusion
• Experimentation
• Hypothesis

How does a scientist test a hypothesis?

• By proposing theory

• By guessing the answer
• By running an experiment

• By asking a question

What is a broad idea that is overwhelmingly supported by scientific evidence, but is still an active topic of research?

• Hypothesis

• Fact

• Theory

• Prediction

A controlled experiment is one in which

• The experiment proceeds at a slow pace to guarantee that the scientist can carefully observe all reactions and process all experimental date

• There are at least two groups, one of which does not receive the experimental treatment

• There are only one group, for which scientist controls all variables

• There is a dependent variable, but not necessarily an independent one

The graph below compares the divorce rate in Maine with the consumptions of margarine in the U.S. over a 10-year period. Which answer is the best conclusion that can be drawn from these results?

• The divorce rate and margarine consumption are not correlated

• The divorce rate and margarine consumptions are correlated, by that does not mean there is any causation

• The divorce rate has a direct effect on margarine consumptions

• Margarine consumption has direct effect on the divorce rate

Which of the following sentences about experimentation is false?

• It can result in a hypothesis being falsified

• It can result in a hypothesis being supported

• It can be result in hypothesis being proven

• It can result in a hypothesis being modified

Why is it important that an experiment include a control group?

• The researcher predetermines the result for the control group

• The control group provides a backup of subjects in case the experiment runs out

• A control group assures that an experiment will be repeatable

• Without a control group, there is no basis fro knowing if a particular result is due to the variable being tested

What the smallest unit that biologists consider "alive"?

• cell
• organism
• molecule
• atom

Which element is not one of the most abundant in living matter?

• Oxygen

• Nitrogen

• Sodium

• Hydrogen

Silicon has atomic number of 14. Which of the following is always true of a silicon atom?

• A silicon atom always has 14 protons.
• A silicon atom always has 14 protons and 14 neutrons.
• A silicon atom always has 14 electrons.
• A silicon atom always has 14 neutrons.