Exam 26: Reproduction and Development

Which one of the following is the earliest event in the process of fertilization?

At about what point in gestation can an ultrasound exam determine the sex of the fetus?

The figure shows a human embryo 31 days after conception.Which of the following structures is part of the placenta?

The "grandmother hypothesis" suggests that a woman can increase her reproductive fitness by ______.

Gastrulation ______.

Into which layer of the uterus does the embryo implant?

Menstruation ______.

Which of these events occurs first?

At about what point in gestation does the fetal heartbeat become audible by stethoscope and the fetus's movements easily felt by the mother?

Please read the following paragraph and then answer the following question(s). Birth control methods act at many points in the reproductive cycle. Some options, such as birth control pills, are highly effective at preventing pregnancy. However, only a few commonly available methods are effective at preventing the transmission of sexually transmitted disease. The Center for Disease Control estimates that each year about 10 million new STD infections strike people ages 15 to 24. -Which of the following birth control methods provides the most effective protection against pregnancy and sexually transmitted disease for sexually active people?

Why are human testes located in an external sac rather than in the abdominal cavity?

In human females,the ovarian cycle begins when the ______.

Mesoderm gives rise to the ______.

Which of the following types of pathogens cause sexually transmitted diseases that are generally not curable?

Which one of the following statements is true?

Which of the following is associated with sexual reproduction?

Reproductive systems with external fertilization are most common in ______.

The human embryo's first blood cells arise in the ______.

What moves the human egg through the oviduct?

Please read the following paragraph and then answer the following question(s). Birth control methods act at many points in the reproductive cycle. Some options, such as birth control pills, are highly effective at preventing pregnancy. However, only a few commonly available methods are effective at preventing the transmission of sexually transmitted disease. The Center for Disease Control estimates that each year about 10 million new STD infections strike people ages 15 to 24. -A diaphragm functions as a birth control device by ______.