Biology sem1
2.1.4 quiz: chemical reactions and bonding
question 2 of 10
2 points
what causes an ionic bond?
a. a positive ion is attracted to a positive ion.
b. two atoms share electrons.
c. a positive ion is attracted to a negative ion.
d. two ions share electrons.

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.