ovulation
Explanation: ovulation is the release of eggs(ova) from the ovaries is the cycle of change which occurs in female reproductive system for a month.
I think the answer is C) Knots are related to the global coordinate system.
M phase, or mitosis.
(You don't need to know this for your course but more properly cell division could also refer to meiosis or binary fission.)
Tides are caused by the location of the earth, sun and moon.
There are six aorganells in an animal cell. The Nucleus, Ribosomes, Endoplasmic reticulum, Golgi apparatus, Chloroplasts and the Mitochondria.