List and describe three factors that may lead to speciation

Ecologists examine several small areas, called plots, in a Minnesota grassland. In each plot, they list the plant species and place each species into one of five categories.

How do scientists know that some mountains were once at the bottom of an ocean?

How are societies preparing for major risks and do you think that these preparations are sufficient and well justified?

Why do we study geography?

What is the number of inhabited US territoies around the world

The reasons why place change

What was Mao's goal for the Great Leap Forward?

Saturn's rings are composed of hundreds of thousands of small particles, which range in size from less than a few centimeters to several meters.

If your hood suddenly flies up you should turn on your hazard lights and continue driving. True or false?

Which supercontinents were present on earth at the begining of the cretaceous period? a. laurasia and gonwana b pangea c. laurussia and gondwana d rodinia