In eukaryotic cells, the timing of the cell is regulated by?
a) centrioles
b) cyclins
c) spindle fibers
d) the nuclear envelope
21. cancer is a disorder in which some cells have lost the ability to control their
a) size
b) spindle fibers
c) growth rate
d) surface area

answer: all : )

explanation:

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.

the main thing i would use is bricks because if there is a hurricane, there is a great possibility for the house to still stand. and i would also use plexiglass windows instead of regular windows because plexiglass isn't prone to breaking.