Explain how mitosis contributes to the growth of a multicellular organism.

Mitosis allows cells to divide and create identical copies, increasing the total number of cells in the organism and leading to growth.

Describe how cell division helps in the repair of damaged tissue, giving a specific example from the video.

Cell division replaces old, injured, or dead cells with new ones. For example, skin cells are constantly being shed and replaced through cell division, allowing the skin to heal from cuts.

What are gametes, and what role do they play in sexual reproduction?

Gametes are special cells, such as sperm and egg cells, that contain half the usual number of chromosomes. They unite during fertilization to create a new cell with a complete set of chromosomes, leading to genetic diversity.

Cell Growth and Reproduction Needs

7th GradeScience40 min

Learning Objective

I can describe the basic needs of cells for growth and reproduction.

Lesson Flow

Watch Video

5 min

Why do cells divide?

Joao's Lab

Guided Notes

8 min

Key concepts students will learn:

•
Cells divide to help organisms grow, to repair injuries, and to reproduce.
•
Mitosis is a type of cell division that copies DNA and splits into two identical daughter cells, which helps organisms grow.
•
In sexual reproduction, special cells called gametes carry half the usual number of chromosomes and unite during fertilization.

Practice

12 min

8 questions • Multiple choice & Short answer

Exit Ticket

5 min

“Name three reasons why cells divide.”

Teacher Guide

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Answer keys for all questions
Differentiation strategies
Extension activities
Printable student handouts

Cell Growth and Reproduction Needs

Learning Objective

Lesson Flow

Watch Video

Guided Notes

Practice

Exit Ticket

Teacher Guide

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