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Introduction to bacteria

Plant cells have a cell wall in addition to a cell membrane, whereas animal cells have only a cell membrane. Plants use cell walls to provide structure to the plant. Plant cells contain organelles called chloroplasts, while animal cells do not. Chloroplasts allow plants to make the food they need to live using photosynthesis.

This online article delves into our the sun and planets were formed.

These four short online lessons will cover the following:

• The planets of the solar system
• Planet orbits in the solar system
• Gravity in the solar system
• Inner vs outer planets

Overview of animal and plant cells. Topics include cell walls, vacuoles, chloroplasts, peroxisomes, lysosomes, mitochondria, etc.

This short online lesson discusses the planet Jupiter.

This short online lesson explores the planet Mars.

This short online lesson explores the planet Mercury.

This short online lesson discusses the planet Neptune.

This short online lesson discusses the planet Saturn