its answer is A.
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Answer:
your body is attacked by its own immune system
Explanation:
your immune system overreacts and decides to attack your body mistaking healthy objects like skin to be something unhealthy like a virus.
Production of the mature sperm cells have 4 step process beginning at puberty and throughout the male's lifetime. Spermiogenesis is the final process for production of sperm where the spermatids mature into motile spermatozoa. For humans, the spermatogenesis takes 74 days to 120 days and if the transport on the ductal system is included it would take 3 months.
Answer: germ theory
Explanation: Germ theory of disease is a theory in biology. It says that small organisms (called germs), also known as microbes, cause diseases. Most, but not all diseases are infectious diseases. The germ theory states that small organisms cause a reaction in the body of those who are infected. The body's reaction to infection is called a disease.
Reference: Wikipedia
The Telophase 2 is the fourth step or process during Meiosis (cell
division). During Telophase 2, a nuclear envelope forms around each set of new
chromosomes. In this stage, cytokinesis occurs, which is responsible for
producing four daughter cells each with a haploid set of chromosomes. During
the crossing-over phase some chromosomes are observed to have segments that
have recombined with the original parent chromosomes.
<span>
When the phase is over, the two
cells are now finally separated and their nuclear membranes are fully formed
causing the meiosis cell division to be completed.</span>
