sister chromatids are introduced during the (S) or synthesis phase of cell division. The two sister chromatids are separated from each other into two different cells... O <--> O
during mitosis or during the second division of meiosis.
So no, they are apart of a phase, but aren't the entirety of cell division.
The nucleus gives instructions for producing protein
Answer: irregular,inconsistent, unsteady, uneven, shaky, fitful, patchy, variable, varying, changeable, changing, ever-changing, on-and-off, off-and-on, inconstant, erratic, haphazard, unstable, unsettled, spasmodic, sporadic, episodic, intermittent, occasional, unpunctual, wavering, fluctuating, aperiodic, unsystematic, unmethodical, ...
Resistance to a Disease matches up with Immune System
Fetus Develops is apart of the Reproductive System
The Woman's Skin is apart of the Integumentary System
For the Flinching, it's the nervous system
Also for the Baseball player, it's the nervous system.
I hope this helps, and I also hope you get a 100% on this assignment.
Erosion breaks rocks apart.
Hope This Helps You!
Good Luck Studying :)