GED Science 3

Question 1

Which type of blood vessel carries oxygenated blood AWAY from the heart to body tissues?

Accepted Answer

Arteries

Answer

Arteries carry oxygenated blood away from the heart. Veins return deoxygenated blood back to the heart (except pulmonary vessels, which are reversed).

Question 2

What is the role of the kidneys in the human body?

Accepted Answer

Filter blood and remove waste as urine

Answer

The kidneys filter blood to remove metabolic waste products (like urea) and excess water, producing urine. They also regulate blood pressure and electrolyte balance.

Question 3

Which process occurs during mitosis that ensures each daughter cell receives a complete set of chromosomes?

Accepted Answer

DNA replication before cell division

Answer

Before mitosis begins, DNA replication duplicates all chromosomes so each daughter cell receives an identical, complete set of genetic information.

Question 4

What is the primary function of red blood cells (erythrocytes)?

Accepted Answer

Transport oxygen from the lungs to body tissues

Answer

Red blood cells contain hemoglobin, a protein that binds to oxygen in the lungs and releases it to tissues throughout the body.

Question 5

Which of the following is an example of a mutualistic relationship between two organisms?

Accepted Answer

Bees pollinating flowers while collecting nectar

Answer

In mutualism, both organisms benefit. Bees get nectar (food) while flowers get pollinated (reproduction). Both benefit from the relationship.

GED Practice Test

GED Practice Test

GED Science 3