When fertilizer runs off into streams and lakes, what increases in the water? select all that apply.
a. organisms like fish
b. the number of algae
c. the amount of oxygen
d. the amount of toxic chemicals

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

20. in humans, freckles are dominant to no freckles. trey has no freckles and his wife anna grace has freckles, but her dad doesn't. they want to know what percentage of their kids would look like trey. show a punnett square to support your answer.