Keywords: human evolution, homo habilis, ardipithecus ramidus, drought-resistant crop.

Keywords: inhibition zone, antiseptic, incubation, aseptic.

Keywords: waist-to-hip-ratio, cardiovascular disease, diet.

Keywords: mendel, alleles, asexual reproduction, sex-linked, genotype.

Keywords: potato cubes, osmosis, diffusion, active transport, magnification.

Keywords: DNA, nucleotide, phenotype, genotype, alleles.

Keywords: the eye, stem cells, reaction time, mean reaction.

Keywords: Phenolphthalein, enzyme activity, lipase, amylase.

Keywords: bacterial cells, genetic engineering, antibotic resistant bacteria, variation.

Keywords: AIDS, monoclonal antibodies, amino acids, protein.