Day and night is caused by the Earth's axis' rotation. The Earth is tilted about 23.5<span>º and every 12 hours or so, it changes every night.
Correct me if I read it wrong.</span>
Gastrointestinal epithelial cells. The epithelial cells that
like the gastrointestinal tract are typically HIGHLY PROLIFERATIVE. Cells that
line gastrointestinal tract. Cells proliferate and produce plasma cells. The
plasma cells bear antibodies with the identical antigen specificity as the
antigen receptors of the activated B cells.
Answer:
C. the causes of cancer are not usually genetic.
Explanation:
Answer: 3
Explanation:
All elements in group 3 have 3 levels of energy.
Na (sodium) has 3 valences the inner has 2 electrons, the middle has 8 electrons and the outer has 1 electron.
This will continue across the group 3 adding one more electron to the outer valence until Ar (argon).
Remember the Octet rule of 8..?
