Oxygen was absent in Earth's early atmosphere. When oxygen levels rose in the atmosphere, what likely occurred? A. Some life went extinct.
B. Some life survived in a few habitats without oxygen. C. All of the above.
D. Some life survived because it had adaptations and/or evolved metabolism that used oxygen.

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except

What happens when water’s salinity increases? mass decreases. freezing point decreases. buoyancy of objects decreases. the amount of dissolved minerals decreases.

What is the most important inorganic material for livings things? ! due tomorrow!