(a) Based on the data for the groups of cells cultured with 0.1% serum (groups 3 to 7), identify which of the four proteins tested do(does) not appear to play a role in blocking cell cycle entry by fibroblasts.

P 16

Explanation:

P 16 does not appear to play a role in blocking cell cycle entry by fibroblast. cyclin dependdent kinase (CDK) promotes cell cycle progression thus inhibitors of CDK inhibit cell cycle. In graph, it has been shown that in absence of p 16 there is no increase in DNA Content but when others are absent ,DNA CONTENT IS MORE.

answer; (d); skeletal muscles and sensory receptors;

if triangle abc is congruent to triangle def, their interior angles are congruent, because congruent parts of congruent triangles are congruent (cpctc).

that means ∠d is congruent to ∠a; ∠d is equal to 8x - 2.

interior angles of all triangles add to equal 180 degrees, so you can set the sum of these interior angle values equal to 180 and solve for x.

180 = (8x - 2) + 22 + 72

180 = 8x - 2 + 22 + 72

180 = 8x + 92

88 = 8x

11 = x

x = 11