The colour of wheat seeds, or skin colour are common examples used in text books.
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the three main groups are that you gey(:
The 5 colour groups are Red,yellow,green,Purple,Brown xxx
three groups of amphibian
Micronesia, Melanesia, and Polynesia are three main cultural regions within the Pacific Islands. Micronesia includes islands like Guam and Palau, Melanesia includes Papua New Guinea and Fiji, and Polynesia includes Hawaii and Samoa. Each group has its own distinct culture, languages, and traditions.
The three main groups in science are chemistry,biology and physics.
The three main island groups of the Philippines are Luzon, Visayas, and Mindanao. Luzon is the largest island group and includes the capital city of Manila. Visayas is located in the central part of the country and is known for its beautiful beaches. Mindanao is the southernmost island group and is known for its diverse culture and natural resources.
All Cephalopods, squid, octopus and cuttlefish produce ink. The colour differs between these three groups, being blue-black, black and brown respectively
To narrow it down to three groups, it would be strings, winds, and percussion.
Three groups of cnidarians are 1. nematocyst 2. cnidocytes 3. gastrozooids
The three groups of Orca are Transient, Resident and Offshore. See link below..