Do you think the wings of a Galapagos cormorants are vestigial structures?

This is collection of data made by comparing objects in standard units. in science, the units are metric.

What vitamin gives carrots and sweet potatoes their orange color?

How do energy and matter move through an ecosystem? both energy and matter unidirectionally flow through an ecosystem. both energy and matter cycle within an ecosystem. matter unidirectionally flows through an ecosystem, whereas energy cycles within an ecosystem. energy unidirectionally flows through an ecosystem, whereas matter generally cycles within an ecosystem.