What must the membrane protein do so that hydrogen ions can flow through it ?

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Albinism is an inherited genetic disorder. explain what it is meant by inherited genetic disorder

Land conservation is a worldwide priority. there are several methods to prevent the loss of land due to a variety of reasons. which method is not a way to conserve land? a) sea walls b) rainwater harvesting c) limits on clear cuts of forests d) cut and burn methods of clearing land