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Active transport requires energy to be used for a molecule to pass through a cell membrane. This happens when a molecule needs energy to pass through from a lower concentration go a higher one.

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Osmosis is a water specific process of transporting water across the cell membrane. Osmosis is a type of passive transport. This process happens when a cell is trying to make the concentrations outside and inside of the cell even.

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Diffusion is a type of passive transport.

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Passive transport does not require any energy for molecules to pass. There are two main types of passive transport which is diffusion and osmosis.

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Photosynthesis occurs in the chloroplasts of a plant cell. Photosynthesis is when a plant takes in carbon dioxide, water, and energy. then it produces glucose and oxygen.

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Chloroplasts are organelles that can only be found in plant cells. They produce food for plants. Chloroplasts contain chlorophyll which gives a plant its green color.

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Mitochondria are located in plant and animal cells. This organelle creates energy for the cell to function. A mitochondrion is sometimes referred to as the powerhouse of a cell.

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To be considered an organism you have to have one or more cells. Any living thing is considered an organism. Some organisms have organ systems that help them stay alive.

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When organs are grouped together it makes a organ system. Each system is necessary for life. There are many systems in your body and each perform an important job for your body.

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A organ is formed when tissues group together. They are located throughout your whole body. Organs perform specific jobs depending on their location in the body.

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Tissue is formed when cells group together. The type of tissue depends on its location in the body.

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Steve Gallik | Biology & Science Teachings

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Cells are the basic units of all organisms. Every cell type has their own function. When cells are grouped together they form a tissue. There are two major types of cells which are prokaryotic or eukaryotic.