<span>In the duct system the atop testis where sperm mature from is known as the epididymis</span>
Changes in the dna are called mutations. They can occur spontaneously. Mutations can only be passed down in gametes--sperm and egg cells. with Darwins theory at mind a mutation needs to pass the test of natural selection to remain in the gene pool. So purposly making mutation or altercations may end in diseases/illnesses or in some cases death because they body can not take it.....hope this helps if it doesnt im sorry!
The nucleolus is the central support structure
Answer:
e. equal numbers of protons and neutrons in the nucleus orbited by varying numbers of electrons
Explanation:
A journal could be used as a recording device to share and show proof of scientific data.
