What caused the amount of oxygen in the atmosphere to stabilize to the extent that it is today?
a. oxygen was toxic to many of the organisms living at the time.
b. carbon dioxide dissolved into the oceans, eventually forming carbonate rocks.
c. carbon dioxide dissolved into the oceans and was eventually used in the formation of sea creatures' shells.
d. the amount of oxygen consumed by respiratory organisms balanced the amount of oxygen produced by plants undergoing photosynthesis.

Fruit bats in central america eat bananas and other fruits. banana plants rely on bats for pollination. what would be the most likely consequence on the banana crop if fruit bats were eliminated from the area? the banana crop would increase because bats would stop eating the crops. the banana crop would decrease because bats would no longer pollinate the crops. the banana crop would remain constant because bees would replace the bats. the banana crop would remain constant because the plants would adapt using asexual reproduction.