How to Plant Rye Grass Four Methods: Preparing Your Planting Area Seeding Ryegrass Laying Ryegrass Sod Caring for Your Ryegrass Community Q&A Ryegrass is often used in northern climates due to its ability to tolerate cool temperatures, and is typically planted when other, more permanent grasses have died out for the year.
substitution of collateral. Definition. A provision in a mortgage to allow the borrower to obtain a release of the original collateral by replacing it with another form of collateral satisfactory to the lender. Print Cite / Link.
A substitution is a mutation that exchanges one base for another (i.e., a change in a single chemical letter such as switching an A to a G). Such a substitution could: 1  change a codon to one that encodes a different amino acid and cause a small change in the protein produced.2  For example, sickle cell anemia is caused by a substitution in the beta-hemoglobin gene, which alters a single amino acid in the protein produced. For example, sickle cell anemia is caused by a substitution in the beta-hemoglobin gene, which alters a single amino acid in the protein produced. 2  change a codon to one that encodes the same amino acid and causes no change in the protein produced. 3  These are called silent mutations.