"" "biology" Trace the pathway of the egg from where it is produced to how it exits the body. a. ovary - fimbriae - isthmus of oviduct - infundibulum - ampulla of the oviduct - oviduct - uterus - internal os - cervical canal - external os - vagina - vaginal orifice/vestibule b. ovary - fimbriae - infundibulum - ampulla of the oviduct - oviduct - isthmus of oviduct - internal os - uterus - cervical canal - external os - vagina - vaginal orifice/vestibule c. ovary - fimbriae - infundibulum - ampulla of the oviduct - oviduct - isthmus of oviduct - uterus - internal os - cervical canal - external os - vagina - vaginal orifice/vestibule d. ovary - fimbriae - ampulla of the oviduct - infundibulum - oviduct - isthmus of oviduct - uterus - cervical canal - internal os - vagina - external os - vaginal orifice/vestibule

C)

Explanation:

The egg or ovum is released at the ovary. It is then captured by the fimbriae which are made up of ciliated and finger-like projections. From the fimbriae it moves through the infundibulum, which is a funnel-shaped opening. It progresses through the ampulla which is the widest section of the fallopian tube and where fertilization usually occurs. From there on through the body of the oviduct and through the isthmus which is a narrow opening connecting the fallopian tube to the uterine cavity.

From the uterine cavity it passes through the internal os (which connects the uterine cavity to the cervical canal), the cervical canal and through the external os to the vagina. From the vagina to the vaginal orifice or vestibule and out of the body.

d.

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step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.