A stem cell is an extraordinary, early stage, unspecified cell that has the potential to develop into a number of specialized cell types.
there important because they can replace cells that have been lost or damaged
In spermatogenesis,from a single spermatogonia 4 haploid sperms are produced after meiosis (100% efficiency).But in case of oogenesis,from a single oocyte only one is transformed into ovum even after meiotic division(25% efficiency)
Answer:
Closest to the equator
Explanation:
The tropical zone is in the middle region of the Earth, which is the closest to the equator. Mark as brainliest please:) I hope this helps.
Explanation:
A) Thickness of the sedimentary rock layers
It is c - magnetism. Obviously because the salt crystals are not magnetic so only the metal iron would be attracted to the magnet separating both.