PBS Practice Final Exam - v2

Front

What part of the blood carries hemoglobin?

Back

Erythrocytes (red blood cells) carry hemoglobin, which is responsible for transporting oxygen throughout the body.

Front

What is the variable that is manipulated in an experiment called?

Back

The independent variable is the one that is manipulated or changed in an experiment to observe its effects.

Front

If a blood sample clumps with anti-A serum but not with anti-B serum, what is the blood type?

Back

The blood type is A.

Front

Which component of blood helps to stop bleeding when there is a cut?

Back

Platelets are responsible for blood clotting and stopping bleeding.

Front

What is the term for minute pieces of evidence not readily seen at a crime scene?

Back

Trace Evidence refers to small pieces of evidence that can provide important information in forensic investigations.

Front

What is the function of leukocytes in the blood?

Back

Leukocytes (white blood cells) are responsible for the immune response and help protect the body against infections.

Front

What is plasma in the context of blood?

Back

Plasma is the liquid component of blood that carries cells, nutrients, hormones, and waste products.

Front

What is a control group in an experiment?

Back

A control group is a group in an experiment that does not receive the treatment and is used as a benchmark to measure how the other tested subjects do.

Front

What is the dependent variable in an experiment?

Back

The dependent variable is the variable that is measured and affected in the experiment.

Front

What is the purpose of a hypothesis in scientific research?

Back

A hypothesis is a testable prediction about the relationship between two or more variables.