✓ A cell is the basic unit of life. Cells come in different sizes and shapes. Most cells are very small in size. We need to use a microscope to help us observe cells. , Note , Ok ethan , Unicellular organisms, Unicellular organisms are living things that are made up of only one cell., Example: bacteria; yeast; paramecia, paramecia = ragi , Note , bacteria, yeast , Note , Ok ethan , Multicellular organisms are living things that are made up of more than one cell. Example: mosses; algae; plants; animals; humans, Note , Ok ethan , , Note , Ok ethan , Muscle cells contract and relax to allow us to produce movement., Note , Ok ethan , Skin cells form a barrier that prevents harmful substances from entering our body., Note , Ok ethan , Nerve cells carry messages between our brain and other parts of the body. This is how our brain controls the activities of our body., Note , Ok ethan , Red blood cells transport oxygen around our body., Note , Ok ethan , White blood cells destroy germs that get into our body. This protects our body against diseases., Note , Ok ethan , Reproductive cells that combine during reproduction to form a new organis, Sperm cells are produced by the male., Egg cells are produced by the female., Bone cells give our body shape and allow us to move., Note , Ok ethan , 2. Cells in plants that Found in leaves:, Mesophyll cells contain structures called chloroplasts. A green pigment (chlorophyll) is found in chloroplasts., Chlorophyll traps light from the sun, enabling the plant to make food., A pair of guard cells surrounds a stoma (plural: stomata) that is located on the underside of the leaves., Stoma or stomata allow gases to move into and out of leaves., 2. Cells in plants that • Found in the stem:, Xylem cells form the xylem, a tube that transports water and minerals., Sieve tube cells form the phloem that transports food., . Cells in plants that Found in roots: Root hair cells absorb water and minerals from the soil., Note , Ok ethan , Why do cells need energy?All living things are made up of cells. Cells also carry out life processes. They need energy to do this and to perform their function., , , , Cells need energy to:, take in nutrients, remove waste materials, divide and form cells, destroy germs that enter our body note, Now Test  , Ok , Ethan , What is the basic unit of life?, A. Atom, B. Cell, C. Organ, D. Tissue, Most cells are very ________ in size., A. large, B. small, C. colorful, D. heavy, What instrument helps us to observe cells?, A. Telescope, B. Binocular, C. Microscope, D. Magnifying glass, Unicellular organisms are made up of how many cells?, A. One, B. Two, C. Many, D. Hundreds, Which of the following is a unicellular organism?, A. Humans, B. Yeast, C. Plants, D. Animals, Multicellular organisms are made up of ......, A. One cell, B. No cells, C. Many cells, D. Empty sacs, Which of the following is a multicellular organism?, A. Bacteria, B. Paramecia, C. Humans, D. Yeast, Which cells help us produce movement?, A. Nerve cells, B. Muscle cells, C. Skin cells, D. Blood cells, Skin cells form a barrier to prevent ________., A. Light from entering, B.  Air from escapingD. Air from escaping, C. Blood from flowing, D.Harmful substances from entering, Nerve cells carry messages between ________., A. Our eyes and ears, B. Our brain and other parts of the body, C. Our mouth and stomach, D. Our nose and lungs, Red blood cells transport ________ around the body., A. Water, B. Nutrients, C. Oxygen, D. Carbon dioxide, White blood cells protect the body by ________., A. Transporting oxygen, B. Destroying germs, C. Storing energy, D. Carrying nutrients, Sperm cells are produced by the ________., A. Female, B. Child, C. Both, D. Male, Egg cells are produced by the ________., A. Male, B. Female, C. Both, D. Child, Which cell type controls body activities?, A. Red blood cells, B. Nerve cells, C. Skin cells, D. Muscle cells, What do red blood cells carry?, A. Water, B. Light, C. Oxygen, D. Heat, What protects the body against diseases?, A. White blood cells, B. Red blood cells, C. Nerve cells, D. Muscle cells, Mesophyll cells are found in which part of a plant?, A. Root, B. Stem, C. Leaf, D. Flower, What green pigment is found in chloroplasts?What green pigment is found in chloroplasts?, A. Chlorophyll, B.  Hemoglobin, C. Melanin, D. Protein, Chlorophyll helps the plant to ________., A. Absorb minerals, B. Trap light from the sun, C. Absorb water, D. Grow roots, A pair of guard cells surrounds a ________., A. Stoma, B. Xylem, C. Phloem, D. Root hair, Stomata allow gases to _______, A. Move into and out of leaves, B. Flow in the stem, C. Move in roots, D. Stay inside leaves, Xylem cells transport ________ and minerals., A. Water, B. Air, C. Chlorophyll, D. Oxygen, Sieve tube cells form the ________ that transports food., A. Root hair, B. Phloem, C. Xylem, D. Stoma, Root hair cells absorb ________ from the soil., A. Air, B. Water and minerals, C. Food, D. Chlorophyll, All living things are made up of ________., A. Tissues, B. Organs, C. Cells, D. Systems, Cells need energy to ________ nutrients., A. Remove, B. Take in, C. Produce, D. Eliminate, Cells remove ________ materials from the body., A. Useful, B. Waste, C. Extra food, D. Air, Cells divide and form new ________., A. Tissues, B. Cells, C. Organs, D. Systems, Cells destroy ________ that enter our body., A. Air, B. Germs, C. Minerals, D. Blood, A cell is the basic unit of life., True , False , Most cells are large enough to see without a microscope., True , False , Unicellular organisms are made up of only one cell., True , False , Humans are examples of unicellular organisms., True , False , Multicellular organisms are made up of more than one cell., True , False , Muscle cells help our body move by contracting and relaxing., True , False , Skin cells allow harmful substances to enter the body., True , False , Nerve cells carry messages between the brain and other parts of the body., True , False , Red blood cells carry oxygen throughout the body., True , False , Sperm cells are produced by females., True , False , Mesophyll cells contain chlorophyll that helps plants make food., True , False , Xylem transports food around the plant., True , False , Root hair cells absorb water and minerals from the soil., True , False , Cells do not need energy to carry out their functions., True , False , Stoma or stomata allow gases to move into and out of leaves. , True , False , White blood cells protect the body from germs and diseases., True , False , What is a cell and why is it called the basic unit of life?, answer , Ok ethan , What is a cell and why is it called the basic unit of life?, A cell is the smallest unit of life.It is called the basic unit of life because all living things are made up of cells., Ok ethan , Why do we need a microscope to observe cells?, answer , Ok ethan , Why do we need a microscope to observe cells?, We need a microscope because most cells are very small and cannot be seen with the naked eye., Ok ethan , Explain the difference between unicellular and multicellular organisms., answer , Ok ethan , Explain the difference between unicellular and multicellular organisms., Unicellular organisms are made up of only one cell, while multicellular organisms are made up of many cells., Ok ethan , Give three examples of unicellular organisms and multicellular organism, answer , Ok ethan , Give three examples of unicellular organisms and multicellular organism, Examples of unicellular organisms are bacteria, yeast, and paramecia., Examples of multicellular organisms are mosses, plants, and humans., What is the main function of muscle cells in the human body?, answer , Ok ethan , What is the main function of muscle cells in the human body?, Muscle cells contract and relax to allow us to move., Ok ethan , How do skin cells protect our body?, answer , Ok ethan , How do skin cells protect our body?, Skin cells form a barrier that prevents harmful substances from entering our body., Ok ethan , What role do nerve cells play in our body’s activities?, answer , Ok ethan , What role do nerve cells play in our body’s activities?, Nerve cells carry messages between the brain and other parts of the body to control body activities., Ok ethan , Explain the function of red blood cells., answer , Ok ethan , Explain the function of red blood cells., Red blood cells transport oxygen around our body., Ok ethan , How do white blood cells protect our body from diseases?, answer , Ok ethan , How do white blood cells protect our body from diseases?, White blood cells destroy germs that enter our body and protect us from diseases., Ok ethan , Differentiate between sperm cells and egg cells, answer , Ok ethan , Differentiate between sperm cells and egg cells, Sperm cells are produced by the male, while egg cells are produced by the female., Ok ethan , Describe the function of mesophyll cells in leaves., answer , Ok ethan , Describe the function of mesophyll cells in leaves., Mesophyll cells contain chloroplasts that help the plant make food by photosynthesis., Ok ethan , What is chlorophyll and what is its role in the plant cell?, answer , Ok ethan , What is chlorophyll and what is its role in the plant cell?, Chlorophyll is a green pigment found in chloroplasts that traps sunlight to make food., Ok ethan , Explain how guard cells and stomata help plants., answer , Ok ethan , Explain how guard cells and stomata help plants., Guard cells control the opening and closing of stomata, which allow gases to move in and out of leaves., Ok ethan , What is the function of xylem and sieve tube cells in plants?, answer , Ok ethan , What is the function of xylem and sieve tube cells in plants?, Xylem cells form tubes that transport water and minerals from the roots to other parts of the plant., Sieve tube cells form the phloem that transports food., Describe the role of root hair cells in plant roots, answer , Ok ethan , Describe the role of root hair cells in plant roots, Root hair cells absorb water and minerals from the soil., Ok ethan , Why do cells need energy to perform their functions?, answer , Ok ethan , Why do cells need energy to perform their functions?, Cells need energy to carry out life processes and to perform their work., Ok ethan , List and explain four reasons why cells need energy., answer , Ok ethan , List and explain four reasons why cells need energy., Take in nutrients,, Remove waste materials,, Divide and form new cells,, Destroy germs that enter the body..

Science Unit 5

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