... - contain hydrolytic enzymes which can break down structures, acrosome in sperm heads digest a path to ovum. Mitochondria - made of two membranes, the inner one folded to form cristae which stick into the inner solution or "matrix" - carries out aerobic respiration - Also synthesis lipids Plasma membrane - 7nm - Partially permeable, two layers Prokaryotes Bacteria Mostly unicellular 1-10um DNA as a singular circle no membrane Some membranes never envelopes Small ribosomes Eukaryotes Animals, plants, protoctists etc Mostly multi-cellular, complex division of labour 10-100um long Chromosomes inside envelope Loads of membranes, (division of labour) Large ribosomes Tissue - collection of cells specialised to do a specific job, can be different cells or same cells, such as epithelium and xylem respectively. Organ - structural part of the body, and a collection of different tissues. System - collection of organs for a specific job such as the digestive system, or the reproductive system. (PICTURE OF DICOTLEYDNUS AND MESOPHYTIC LEAF) Biological molecules Monosaccharide + monosaccharide by condensation go to a disaccharide, water is also ...

See this essay or coursework document in full right now