|(A) Humans have some rather unique features to our reproductive behavior. One strange one, relative to other animals, is female menopause. What might be the selective advantage to this feature? (B) What selective forces may have led to the evolution of menopause in humans?

Why do you think asexual reproduction is more common in animals like flatworms and sponges than in vertebrates ?

At which embryonic event would one be able to first distinguish whether an embryo is diploblastic or triploblastic?     A)cleavage B)metamorphosis C)fertilization D)gastrulation E)organogenesis

After learning about the reproductive systems, how would advise a couple with following concern: "If we do not want a baby for next two years, how can we calculate the safe sex period?" She shares that her cycle is regular but not standard 28 days long cycle (so the standard explanation form different sources won't work unless you think critically)! At what time of the female cycle is she most likely to prevent fertilization of her ovulated egg? Consider the fact that her cycle is not 28 days but longer or shorter (you pick). Do males have any time (in their cycle- if any) when their gametes would not be able to fertilize the egg? In other words when can intercourse lead to least chance of pregnancy? Feel free to check with your older friends, doctors, nurses, or anyone who you feel comfortable talking about this.