Which of the following statements is true?
a) the ocean contains very little nacl.
b) dissolved minerals from rocks are deposited in the ocean.
c) density is a comparison between volume and salinity.
d) one atmosphere is equal to 20 pounds per square inch (psi).

How does a gymnosperm prevent itself from pollinating the same tree

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

(6.02 mc)what affect do marine protected areas have on environmental quality? they increase environmental quality by preventing resource overuse. they increase environmental quality by adding new species. they decrease environmental quality by removing all human activity. they decrease environmental quality by adding recycling facilities.