specialised cells

• bacteria cell has chromosomal DNA that floats around cytoplasm
• chromosomal DNA is a long and circular organelle that controls cell
• Bacteria had a cell membrane
• Bacteria cell has a plasmid- a small loop of extra DNA: drug resistance.
• Plasmid can be passed around bacteria
• egg cells and sperm cells are specialised cells that have haploid nucleus
• Egg cell carries female DNA and contains nutrients to feed embryo
• After fertilised, egg will immediately change structure to semi permeable membrane so no other sperm gets in
• Sperm cells job is to transport male DNA to female egg
• sperm has lots of mitochondria for energy
• digestive enzymes in acrosomes to break down the egg
• cilliated epithial cells line air ways and have hair
• cilliated epithelial have cilia to move substances
• ciliated epitheal is mostly around air ways to move mucus up the throat however also line organs
• phloem tubes transport food substances like sucrose and amino acids made in the leaves to the rest of plant
• xylem tubes are dead and take water only upwards strengthened with lignin and carry mineral oils from roots to leaves