A. 20. Which is the best description of activation energy? (HB2A2)
Energy added to start a reaction.
b. Energy released as the reaction proceeds
C. Energy stored within the reactant molecules.
d. Energy stored within the product molecules.

answer; 60-100; beats per minute

littering streams           is the answer

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.

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.