Alternative Title: analogous structure. Analogy, in biology, similarity of function and superficial resemblance of structures that have different origins. For example, the wings of a fly, a moth, and a bird are analogous because they developed independently as adaptations to a common function—flying.

The current taxonomic system now has eight levels in its hierarchy, from lowest to highest, they are: species, genus, family, order, class, phylum, kingdom, domain.

A phylogenetic tree, also known as a phylogeny, is a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor.

Analogous colors are colors that are next to each other on the color wheel. For example, yellow, green-yellow, and green are categorized as analogous colors. The word ‘analogous’ is defined as two things with a similar function or feature that are comparable to one another.

Examples of complementary color combinations:

• Red and green.
• Blue and orange.
• Yellow and purple.
• Yellow-green and red-purple.
• Red-orange and blue-green.

Analogous color schemes use colors that are next to each other on the color wheel. They usually match well and create serene and comfortable designs. Analogous color schemes are often found in nature and are harmonious and pleasing to the eye. Make sure you have enough contrast when choosing an analogous color scheme.

Analogous colors are groups of three colors that are next to each other on the color wheel, and a tertiary. Red, orange, and red-orange are examples. The term analogous refers to having analogy, or corresponding to something in particular.

From Colorpedia. A tetrad is a color scheme, a special variant of the dual color scheme, with the equal distance between all colors. All four colors are distributed evenly around the color wheel, causing there is no clear dominance of one color.