GCSE Biology AQA (Organization) Exam Questions and Answers 100% Pass

GCSE Biology AQA (Organization) Exam Questions and Answers 100% Pass Specialised cells - Answer️️ -As an organism develops, cells differentiate to form different types of cells. As a cell differentiates: - it may change shape - different sub-cellular structures develop to let it to carry out a specific function. Include cells such as sperm, nerve and muscle cells. Sperm cell - Answer️️ -Tail: to propel the sperm to fertilise the egg. Mitochondria: sperm have many of these cell components, which are the major site of respiration, to provide energy for their journey. Nucleus: contains only one set of the genetic material. Acrosome: contains enzymes to allow the sperm to penetrate the outer layer of the egg. Muscle cell - Answer️️ -Contains: - nucleus - many mitochondria for energy - protein fibres that can contract Motor neurone - Answer️️ -Contains: - dendrites - cell body - axon - sheath (acts as an insulator) Xylem cell - Answer️️ -The cells are arranged end to end but the end walls break down to form hollow tubes. The cell wall of the cell is strengthened by a substance called lignin. Phloem cell - Answer️️ -The end wall of the cells allow sugars through but support the tubes. The cells are arranged end to end into tubes. Contain companion cells. Root hair cell - Answer️️ -Lots of mitochondria for active transport of minerals. Long projection to increase the surface area to absorb water and minerals. Tissue - Answer️️ -A group of cells with a similar structure and function, which all work together to do a job. Examples of tissues - Answer️️ -- muscle tissue contracts to produce movement - glandular tissue produces substances such as enzymes and hormones - epithelial tissue covers organs Organs - Answer️️ -Groups of different tissues, which all work together to perform a specific job. Each may contain several tissues. Stomach - Answer️️ -An organ that contains: - muscle tissue that contracts to churn the contents - glandular tissue to produce digestive juices - epithelial tissue to cover the outside and insid