If a twisted ladder is used as a model of DNA, which parts of a DNA molecule correspond to the sides of the ladder?

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

Which experiment would most likely contain experimental bias ?

The images show the wings of a bat and a bee. from this evidence, what can you conclude about the evolutionary relationship between these organisms? a. the wing structures of the bat and the bee are different, indicating they didn’t inherit wings from a common ancestor. b. the wing structures of the bat and the bee are different, indicating they inherited wings from a common ancestor. c. the functions of bat wings and bee wings are the same, indicating they obtained wings from a common ancestor. d. the functions of bat wings and bee wings are different, indicating they didn’t obtain wings from a common ancestor.