Pick three different plant families from three different phyla. A good place to start is the Family Guide for Fruits and Seeds at the U. S. Department of Agriculture website. For each family, choose two species of plants each to study in-depth. Then, reproduce and fill out the following chart, being as specific as you can. Use a separate page to create your botanical diagrams for each species. List all sources you consulted for the assignment, either within the chart or on a separate sheet of paper, including URLs where appropriate.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.

links? do you have a link? i don't see anything?