January 20, 2009 is the 20 day of the year 2009 in the Gregorian calendar. There are 345 days remaining until the end of this year. The day of the week is Tuesday. If you are trying to learn Spanish then this day of the week in Spanish is martes. A person born on this day will be 6 years old today.
In the Rhizopus life cycle, the structures that are involved in sexual reproduction are zygote, zygospore, sporangium, spores and gametes. The structures that are involved in asexual reproduction are mycelium, hyphae, strains, and sporangiophore. 4 people found this useful.
To understand the male reproductive system, one must know the external and internal structures, and the process of spermatogenesis (sperm production) including the physiologic pathway of the sperm cell.tructures. The male external structures are the penis and the scrotum (a pouch which protects the testes). The penis consists of the glans (the head), and the shaft (the body). The glans is covered by a fold of skin called the foreskin (circumcision removes the foreskin).