Mammals are different from birds in all these characteristics except

answer; ///(b) it is composed of four protein chains and four heme groups;

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.

the answer is c. altitude. hope this ! #brainiac