Deer destroy gardens by feeding on plant leaves, stems and roots. Fortunately, catnip, chives, dill, garlic, lavender, onion, oregano, rosemary, sage, spearmint and thyme keep deer away from your garden, lawn and shrubbery. While people find the smell of these herbs pleasant, deer dislike their odor and give areas planted with them a wide berth.
From RationalWiki. An experimental control, often referred to as a control group, is a population or set of objects that is statistically similar to the set being tested, on which no changes are implemented. In psychology and biology, the control group is very important, since results are often statistical rather than concrete. For instance, in testing a drug for a malady, some percentage of the test subjects will heal with no intervention (or heal at some rate in a third group, people getting an existing remedy).
Prokaryotes tend to control their gene expression at the transcriptional level, often through the use of operons. An operon is a group of genes that functions together and is regulated together. A classic example of this is the lac operon, which was first discovered in e.coli.The lac operon in e.3.3 Explain the steps involved in the process of protein synthesis and how genetic expression is controlled in prokaryotes and eukaryotes by regulatory proteins (e.g., the role of operons in prokaryotic cells; the mechanism of gene expression in eukaryotic cells).