Let’s solve each question step by step.
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First Question:
> Which level of biological organization includes all the others?
> A. Tissue.
> B. Cell.
> C. Organ.
> D. System.
Think about how living things are built, from smallest to biggest:
-
Cells are the basic building blocks — like tiny bricks.
- Many similar cells together make a
tissue (like muscle tissue).
- Different tissues working together form an
organ (like your heart or stomach).
- Organs that work together make a
system (like the digestive system or circulatory system).
So, which one is the BIGGEST and includes all the others?
→ A
System is made up of organs, which are made of tissues, which are made of cells.
That means “System” includes everything else listed.
✔ Correct answer:
D. System
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Second Question:
> Look at the image. Which level of organization does it belong to?
> (Image shows a human heart)
> A. Tissue.
> B. Cell.
> C. Organ.
> D. Organism.
The image is of a
heart. What is a heart?
- It’s not just one cell — it’s made of many kinds of cells.
- It’s not just tissue — it has muscle tissue, nerve tissue, blood vessels, etc., all working together.
- It’s also not the whole organism — because the organism would be the entire person or animal.
- The heart is a structure made of different tissues that work together to pump blood → that makes it an
organ.
✔ Correct answer:
C. Organ
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Final Answer:
1. D
2. C
Parent Tip: Review the logic above to help your child master the concept of science worksheet for 5th graders.
