a scientist conducted a study on the changing population sizes of virginia birds. what was the mean number of tri color herons from 2009 - 2011 round to nearest whole number?

What field of science did harry hess study?

Depending on the organism the number of in a cell may change

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.