B1

• Tissue - group of specialised cells with similar structure and function
• Magnification = size of image / size of real object
• Muscle cells contain mitochondria for energy
• Muscle cells contain protein fibres to change length
• Animal and plant cells are eukaryotes
• Bacterial cells are prokaryotic
• Microscopy involves the use of two types of microscopes: the light microscope, which uses light to form an image and can be used to view live specimens, and the electron microscope, which uses electrons to form an image and cannot be used to view live specimens. Electron is way more powerful and accurate
• The nucleus controls the cell's activities and contains genetic material.
• The mitochondria is where aerobic respiration occurs and releases energy for the cell.
• The ribosome's function is protein synthesis
• • Eukaryotic and prokaryotic cells share features such as a cell membrane, cytoplasm, and genetic material found inside a nucleus.
• • Prokaryotic cells have a cell membrane, cytoplasm, ribosomes, and a cell wall, unlike eukaryotes which only sometimes have a cell wall.

  
• Nerve cell adaptations -

  Dendrites to make connections

  Axon carries electric impulses

  Synapses allow impulse to pass from one to another

  
• Sperm cells adaptation -

  Cell is streamlined

  Flagellum allows swim

  Mitochondria in middle section to provide energy for swimming

  Acrosome has digestive enzymes to break through egg

  
• Root hair cell adaptation -

  Root hair to increase surface area of root

  Permanent vacuole that speeds up movement of water by osmosis

  Mitochondria to transfer energy needed for active transport of mineral to the cell