All living beings - bacteria, animals, humans, plants - are made of cells. Amoeba is a single cell bacteria; human and most of the living world is made up of many cells. A human body has around 200 different cells. Each body part - hair, skin, blood, bone, heart, liver, etceteras - is made up of a different type of cell. Each type of cell has certain physical properties and knows its function.
How does a cell know its function - this information is stored inside the cell in the form of DNA(Deoxyribonucleic acid is a molecule). This information tells cell how to work.
DNA looks like this,
How do animals and plans grow ? - by cell division. One cell divided into two, two into four, four into eight and so on. This how babies grow into adults, seeds grow into trees. Since amoeba is a single celled organism, division of that single cell means the parent amoeba dying and two young amoebae being born.
Multiple cells form a tissue, group of tissues form a organ and all the organs together form an organism.
Watch this amazing video that shows the cells inside human body
How does a cell know its function - this information is stored inside the cell in the form of DNA(Deoxyribonucleic acid is a molecule). This information tells cell how to work.
DNA looks like this,
How do animals and plans grow ? - by cell division. One cell divided into two, two into four, four into eight and so on. This how babies grow into adults, seeds grow into trees. Since amoeba is a single celled organism, division of that single cell means the parent amoeba dying and two young amoebae being born.
Multiple cells form a tissue, group of tissues form a organ and all the organs together form an organism.
Watch this amazing video that shows the cells inside human body
again. perfect timing learning in bio. viedo was epic
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