WCAS - Washington Comprehensive Assessment of Science Molecules to Organisms Structures Questions and Answers

Question 1

A student is examining a diagram showing the levels of biological organization. Which of the following lists correctly arranges these levels from the simplest to the most complex?

Accepted Answer

Organelle, Cell, Tissue, Organ, Organ System

Answer

Cell, Organelle, Tissue, Organ System, Organ

Answer

Tissue, Cell, Organ, Organelle, Organ System

Answer

Organ System, Organ, Tissue, Cell, Organelle

Question 2

A student observes a cell under a microscope and notes the presence of a rigid cell wall, a large central vacuole, and numerous chloroplasts. Based on these observations, the student can most likely conclude that the cell is from what type of organism?

Accepted Answer

A plant

Answer

A fungus

Answer

An animal

Answer

A bacterium

Question 3

The heart is an organ composed of cardiac muscle tissue, connective tissue, and nervous tissue, all of which work together to pump blood. This is an example of which biological principle?

Accepted Answer

Multiple tissues combining to form a functional organ.

Answer

Cells differentiating to perform unique roles.

Answer

Organs grouping together to form an organ system.

Answer

Similar cells aggregating to form a single tissue.

Question 4

In a complex multicellular organism, which organ system is primarily responsible for detecting stimuli from the environment and coordinating the body's responses?

Accepted Answer

Nervous system

Answer

Endocrine system

Answer

Circulatory system

Answer

Muscular system

Question 5

Mitochondria are often called the 'powerhouses' of the cell. What is the primary function of mitochondria in both plant and animal cells?

Accepted Answer

To break down sugars to release energy in the form of ATP.

Answer

To store genetic information and control cell activities.

Answer

To capture light energy and convert it into chemical energy.

Answer

To package and transport proteins and lipids.

Question 6

Which of the following statements BEST describes the relationship between cells and tissues?

Accepted Answer

Tissues are groups of similar cells that work together to perform a specific function.

Answer

Tissues are made of a single, highly specialized cell.

Answer

A cell is made up of several different types of tissues.

Answer

Cells and tissues are independent structures with unrelated functions.