As energy flows through ecosystems, atoms and molecules cycle among

Which would be the most useful source of evidence to support mcneill's contention?

Vessels draining the myocardium of the heart, open primarily ,into which chamber?

2. which of the following statements does not accurately describe stem cells? a. embryonic stem cells make up the inner cell mass of a blastocyst. b. with more research, stem cells may be used to repair or replace damaged cells. c. the use of stem cells is without any objections since it can be used in therapies to humans. d. adult stem cells are multipotent and can differentiate into many types of cells.