Substrate concentration <span />
Answer:
The identification of gaps from systematic reviews is essential to the practice of “evidence-based research.” Health care research should begin and end with a systematic review. A research gap may not be a research need if filling the gap would not be of use to stakeholders that make decisions in health care.
Explanation:
Metalliods because they have both characteristics of metals and non metals
Earth's birds developed their diversity through natural selection by some birds need to have long beaks if they need to fish and some need webbed feet to swim. They have these traits through natural selection.
