Xylem tissue transports water and mineral ions from the to the stems and leaves. It is composed of hollow tubes strengthened by lignin adapted for the transport of water in the stream.

this is math not biology xd

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.