Which is a reason for the rise of nitrate levels in ground water?
a) overuse of fertilizers
b) ammonification by animals
c) soil erosion at grasslands
d) nitrogen fixation by azotobacter

Sperm pass through the and connect to a short ejaculatory duct. vas deferens prostrates seminiferous tubules none of the above

Which statement describe events that occur during interphase?

Prior to the mt. st. helens eruption on may 18, 1980, satellite and topographic views of the volcano were captured. based on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m? question 9 options: 600 m 400 m 750 m 500 m