work mainly by thickening cervical mucus and preventing ovulation. They contain both estrogen and progesterone, and some research shows that they are slightly more effective but carry slightly more risks than alternative birth control pills.

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

there is no

explanation:

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b

blue

light-years

magnitude