Biology Final Exam Practice questions

How many variables should be changed in a controlled experiment

• 1

• at least 2

• As many as needed

• Between 1 and 100

Four different types of cells are shown in picture. Which characteristic is shared by all four cells?

• A mechanism for transforming sunlight into energy
• Self-locomotion
• Membrane-bound organelles that transport substances
• Genetic material composed of DNA

An experiment in which all variables but one are kept constant is called a(an) _______ experiment.

• independent
• controlled
• graphing
• dependent

Scientific questions typically begin with a(an):

• data
• conclusion
• hypothesis
• observation

A variable deliberately changed in an experiment is called the ______________ variable.

• independent
• dependent
• controlled
• all of the above

The observed variable that changes in response to the independent variable:

• dependent variable
• controlled variable
• independent variable
• hypothesis

A _______ is exposed to the same conditions as the experimental group except for one independent variable.

• hypothesis
• control group
• independent variable
• group

Scientists select similar plots of grass in an experiment.  They have the same soil, water, and so on.  These traits are:

• constants or controlled variables
• experimental groups
• hypotheses
• none of the above

Mary adds vitamins to the food of one group of rabbits in an experiment to see the effect of fur quality. The independent and dependent variables are ___and _____.

• vitamins/fur quality
• fur quality/vitamins
• vitamins/rabbits
• length of fur/rabbits

In this graph, what is the dependent variable? 

• Walla Walla Island
• Time
• Number of Deer