Elem. Science 5 B (Acc. Ed) 20-21 / Module 7 5. How have arctic tundra herbivores adapted to their ecosystem? (Select all that apply.)
They migrate to the south during the cold months.
They have extra fur to protect against the cold.
They can change their internal temperatures when needed.
They can survive on short plants, mosses, and lichens.

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem