Answer:
By 1900, the White House staff included one "secretary to the president" (then the title of the president's chief aide), two assistant secretaries, two executive clerks, a stenographer, and seven other office personnel.
They must manage a lot of jobs and housing for many including citizens, immigrants, and refugees
Answer:
Sponges were among the earliest animals. While chemical compounds from sponges are preserved in rocks as old as 700 million years, molecular evidence points to sponges developing even earlier.
