Look at the picture of a trilobite. these animals were once present in the ocean but are now completely extinct. what is a likely cause of trilobite extinction? a. something changed to limit and finally abolish their success in this environment. b. something changed that brought these creatures onto land in slightly different form. c. they failed to develop vestigial organs that would have them survive. d. they were no longer able to acquire their necessary characteristics for survival in a changing environment.

How do temperature and salinity affect deepwater currents? they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water.

Which of the following can occur to two segments of a population if they are geographically isolated 1.) they can only share some types of genes 2.)both groups most likely become extinct 3.)they find a way to come back together 4.)eventually they become separate species

What is one affect on the australian environment due to the introduction of non-native european rabbits