23.1 Animal Characteristics KEY CONCEPT Animals are diverse

23.1 Animal Characteristics KEY CONCEPT Animals are diverse

23.1 Animal Characteristics KEY CONCEPT Animals are diverse but share common characteristics. 23.1 Animal Characteristics Animals are the most physically diverse kingdom of organisms. Animals range in size from 25-meter-long blue whales

to microscopic rotifers. Animals are found nearly everywhere on Earth. 23.1 Animal Characteristics All animals share a set of characteristics. All animals share a unique set of derived characters. Animal cells are

supported by collagen. three-stranded protein found in bone, skin, ligaments, fingernails, and hair

23.1 Animal Characteristics Animals are diploid and usually reproduce sexually. diploid parents produce diploid offspring do not have free-living haploid life stages Diploid cells have two copies of each chromosome: one copy from the mother and one from the father

23.1 Animal Characteristics Most animals have Hox genes. Homeotic genes control early development. Hox genes determine the position of cells differentiation. A Hox gene mutation leads to the development of a body structure in the wrong position.

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