Which gas is not abundant in earth's atmosphere? a. oxygen
b. hydrogen
c. nitrogen
d. argon

Which of the following is not a way in which a vascular plant's xylem and phloem are similar?

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.

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?