10. darius wanted to test how the mass of a paper airplane affected the distance it would fly.
paper clips were added before each test flight. as each paper clip was added, the plane was
tested to determine how far it would fly.
a. independent variable (iv):
b. dependent variable (dv):
c. control:
d. constants:

organisms that are both used in toothpaste as well as cause malaria are protista and monera.

one centimetre is equal to 0.01 metres

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.