Chromosomes: Packages of DNA (Part 4)

What You'll Learn

Cell organelles each have specific functions. The mitochondria produce energy, the ribosome makes proteins, the endoplasmic reticulum processes molecules, and the Golgi apparatus packages them.

Key Words

natural selection
evolution

Materials Needed

ruler
scissors
microscope (or magnifying glass)
slides

Safety First

Keep small objects away from young children.

Steps

Step 1 — Read

Read the introduction and identify the main idea of this lesson.

Step 2 — Do

Build a 3D cell model using household materials (plastic bag for membrane, gelatin for cytoplasm, a grape for nucleus). Label all organelles.

Step 3 — Observe

Compare the before and after states.

Step 4 — Record

Write your conclusion: did the results match your hypothesis? What would you change next time?

Check Your Understanding

Question 1

1 of 3

How many chromosomes do human body cells have?