Which of the following is not an organ of the urinary system?
a. kidney
b. collecting duct
c. ureter
d. urinary bladder

What would happen if the krill were removed from the food web

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.