Which is represented by the X?

nephron
ureter
bladder
urethra

What are the probable phenotypes of their offspring

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun

Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d