CSET CSET Subtest II Life Sciences 3

Question 1

Which blood vessel carries oxygenated blood away from the heart to the body?

Accepted Answer

Aorta

Answer

The aorta is the largest artery and carries oxygenated blood from the left ventricle to the systemic circulation.

Question 2

What is the term for the maintained internal stability of an organism's physiological conditions?

Accepted Answer

Homeostasis

Answer

Homeostasis refers to the processes by which organisms maintain a stable internal environment despite external changes.

Question 3

Which plant tissue is primarily responsible for transporting water and minerals from roots to leaves?

Accepted Answer

Xylem

Answer

Xylem is the vascular tissue that conducts water and dissolved minerals upward from roots through the plant.

Question 4

A population of bacteria doubles every 20 minutes. Starting with 100 bacteria, how many will there be after 1 hour?

Accepted Answer

800

Answer

After 1 hour (3 doublings), the population is 100 × 2³ = 800 bacteria.

Question 5

Which hormone signals the kidneys to reabsorb more water, reducing urine output?

Accepted Answer

Antidiuretic hormone (ADH)

Answer

ADH (vasopressin) acts on the collecting ducts of the kidney to increase water reabsorption.

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