1.
Evolution not only explains how organisms are different, but it also explains the similarities of all life forms on Earth.
True
False
2.
What factors in an experiment are observed, measured, and recorded?
dependent variables
hypothesis
constants
independent variables
3.
A researcher finds that blood alcohol levels cause progressive damage to the liver. All the mice in his study were fed the same amount and types of food. Different concentrations of alcohol were injected into each mouse. One group of mice does not receive any alcohol at all. The different concentration of alcohol injected into different mice represents the ______________________.
dependent variable
constant
independent variable
control
4.
A group of related parts that work together to perform a specific function or form a whole is known as a __________________.
homeostasis
system
stimulus
species