Biodiversity is the variety of different types of life found on Earth and the variations within species. It is a measure of the variety of organisms present in different ecosystems. This can refer to genetic variation, ecosystem variation, or species variation (number of species) within an area, biome, or planet.
Craftsman is one of the leading brands of gas and electric chain saws. Craftsman chain saws come in a variety of bar lengths, from 10 inches to 20 inches, and are geared to the consumer market. The Craftsman electric chain saws have smaller bar lengths than their gas counterparts.
To be sure that our results weren't an anomaly, we tested two samples of each brand. When we pitted store brands against Heinz ketchup and Hellmann's mayonnaise, we found at least one near-twin for each: Market Pantry (Target) ketchup and Market Pantry, Great Value (Walmart), and Kirkland Signature (Costco) mayos. All are more than one-third cheaper than the name brand.