Cell Organelles and Their Jobs

What You'll Learn

Mutations are changes in DNA sequence that can occur randomly. Most mutations have no effect, some are harmful, and a few may be beneficial and help a species adapt.

Key Words

species
heredity
allele

Steps

Step 1 — Read

Look at the vocabulary words and write a definition for each in your own words.

Step 2 — Do

Prepare a wet-mount slide of an onion skin and observe it under a microscope (or magnifying glass). Draw and label the cell wall, cell membrane, and nucleus.

Step 3 — Observe

Use your senses (except taste) to describe what you notice.

Step 4 — Record

Write a summary of your findings in 3-5 sentences.

Check Your Understanding

Question 1

1 of 3

What organelle produces energy for the cell?