If twins are born and one is a boy and one is a girl, are they identical or fraternal siblings?
a. identical
b. neither
c. fraternal
d. both

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley

The “ecological footprint” left by a citizen of a developed nation is about four times larger than that left by a citizen of a developing nation. why is this the case?

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.