A study is investigating whether a specific fertilizer increases plant growth. In this study, whether or not the plant has fertilizer applied to it is the _____________ variable.

Fifteen randomly selected students are found to be taller than 6 feet. The researchers concluded that the average height of a student is greater than 6 feet. This is an example of experimental bias.

You are using the 300, 150, 100, 75, 60, 50 method to determine the heart rate. You locate an R wave that falls on a bold line on the ECG paper. The next consecutive R wave after your starting points falls directly on the 3rd bold line. This patient’s heart rate is ______ beats per minute. 

In the scientific name, the genus is always capitalized and the species is always lowercase.

Do you think viruses are considered living? Why or why not?

Explain how neuroplasticity of the brain changes throughout life, noting the factors that contribute to those changes.

Isotopes of an element are differentiated by their ____________.

Identify the structure labeled number 5. 

Identify the structure labeled number 4. 

O2 is an organic compound.