Sian Ferguson

life sciences biology grade 12 grade 11 dna nucleic acid rna plant diversity plants life cycle of a plant plant classification enviromental studies human effect on the environment air pollution land pollution water pollution environmental solutions responses plant defense auxins plant abscicic acids plant hormones gibberellins environment kidney human homeostasis urination excretion urine virus replication viruses fungi microbes tb bacteria protists hiv lymph system circulatory system blood blood vessel transport human heart plant reproduction botany eye structure of the eye paper 3 essay help creative writing english home language study preparation matric tips compositions creative english english first additional language writing nsc ncs english language matric 2013 transactional writing guide phototropism geotropism plant hormone auxin transcription dna profiling dna replication translation genetic fingerprinting effectors stimuli peripheral nervous system reflexes nervous system central nervous system chromosomes genetics mitosis meiosis crossing over receptors function of the eye