Which statements about the geocentric model are false? Select the two correct answers. A. It shows Earth at the center of the solar system.
B. It explains why Mars appears to move backward for a few months approximately every two years.
C. It shows the Sun at the center of the solar system.
D. It shows the orbits of the planets as circular.

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.