The nucleus of an atom contain protons and neutrons, which make up most of the mass of an atom.
The answer would be 2 and 3 ( 2nd answer choice)
Once the sperm cells are formed, the are stored in the epididymis, where they are temporarily stored while they mature.
Hope this helps :)
The animal cell will swell and then eventually burst when placed in a Hypotonic Solution.
Microscopes allowed scientists to observe Prokaryotic cells which make up Bacteria and Archaea. These cells are small and contain no membrane- bound organelles. It allowed them to observe Eukaryotic cells with a nucleus and membrane-bound organelles that perform different life functions.
