A gardener observes four organisms in her yard: a garden lizard, an earthworm, a honeybee, and a sparrow.…
A gardener observes four organisms in her yard: a garden lizard, an earthworm, a honeybee, and a sparrow. She places the lizard and sparrow in Group X, and the earthworm and honeybee in Group Y. Which criterion did she use?
Mode of nutrition (Autotrophic vs Heterotrophic)
Habitat (Aquatic vs Terrestrial)
Presence or absence of a backbone (Vertebrates vs Invertebrates)
Method of breathing (Gills vs Lungs)
Solution
Lizards and sparrows possess an internal backbone (vertebrates), whereas earthworms and honeybees lack a vertebral column (invertebrates).