Which three of the observed phenomena below offer evidence in support of the Big Bang theory? 1. the existence of comets
II. elliptical planetary orbits
III. the energy output of the sun
IV. the cosmic microwave background
V. red shifted light from distant objects
VI. helium makes up 25% of ordinary matter
O A. I, II, III
OB. I, III, V
C. IV, V, VI
OD. II, IV, VI

There are few cells in the body that do not undergo mitosis: most somatic cells divide regularly, some more than others. take for example the cells that line the digestive tract. these cells must be frequently replaced because they are constantly eroded by the movement of food through the tract. what mechanism(s) is/are in place to ensure that these cells are exact copies of the mother cell