___ invented the in 1876, allowing instant communication over long distances
for the first time.
A. Alan Turing, computer
B. Johannes Gutenberg, printing press
C. Alexander Graham Bell, telephone
D. Steve Jobs, text message

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.

Archaebacteria use for movement. celia flagella pili cell walls