Embryonic stem cells, adult stem cells,<span> induced </span>pluripotent stem cells, and <span>mesenchymal stem cells</span>
Hello there!
The helmet-like region of the sperm that is similar to a large lysosomr and assists penetration of the egg is called the Acrosome.
The correct term would be "Acrosome".
Hope this helps!
~Lexa
Answer:
One problem of geologists about studying the past is it is difficult or even impossible to carry out controlled experiments.