Atmosphere and Climates I need help can yall help me with it worksheet please

Its Earth Science ​

Place the steps tor the formation of the enzyme pepsinogen in correct order

Which of these is not a nucleotide base found in dna?

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.