Conception begins with the following three events:
a. The menstrual cycle reaches its midpoint, the ovum reaches the fallopian tube, the male ejaculates semen that race to the ovum.
b. The ovum reaches the fallopian tube, the male ejaculates semen, the sperm race toward the waiting ovum.
c. The ovum reaches the fallopian tube, the male ejaculates semen, the sperm enters the membrane of the ovum.
d. The menstrual cycle reaches its midpoint the ovum, in the fluid-filled follicle, leaves the ovary and heads for the fallopian tube and the ovum reaches the fallopian tube.
Question 2
Amniocentesis is a
a. method of gaining information by using high-frequency sounds that are turned into electrical impulses.
b. method of obtaining prenatal information by cutting cells from the chorionic villi.
c. method of obtaining prenatal information by sampling the amniotic fluid.
d. All of the answers are correct.
The Enzyme Cycle
stages of the family cycle
Rock Cycle
Release of Acetylcholine During the Sleep–Waking Cycle
Events in human fertilization. The light micrograph shows a fertilized human oocyte.
Life cycle of Obelia, a hydrazoan that has alternating medusa (left) and polyp generations