This table shows how the number of kingdoms has changed with each major scientist. Which number belongs in the space labeled X?

Select all the true statements about the cosmic microwave background radiation

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

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.